/**
 * REST API: WP_REST_Attachments_Controller class
 *
 * @package WordPress
 * @subpackage REST_API
 * @since 4.7.0
 */

/**
 * Core controller used to access attachments via the REST API.
 *
 * @since 4.7.0
 *
 * @see WP_REST_Posts_Controller
 */
class WP_REST_Attachments_Controller extends WP_REST_Posts_Controller {

	/**
	 * Whether the controller supports batching.
	 *
	 * @since 5.9.0
	 * @var false
	 */
	protected $allow_batch = false;

	/**
	 * Registers the routes for attachments.
	 *
	 * @since 5.3.0
	 *
	 * @see register_rest_route()
	 */
	public function register_routes() {
		parent::register_routes();
		register_rest_route(
			$this->namespace,
			'/' . $this->rest_base . '/(?P<id>[\d]+)/post-process',
			array(
				'methods'             => WP_REST_Server::CREATABLE,
				'callback'            => array( $this, 'post_process_item' ),
				'permission_callback' => array( $this, 'post_process_item_permissions_check' ),
				'args'                => array(
					'id'     => array(
						'description' => __( 'Unique identifier for the attachment.' ),
						'type'        => 'integer',
					),
					'action' => array(
						'type'     => 'string',
						'enum'     => array( 'create-image-subsizes' ),
						'required' => true,
					),
				),
			)
		);
		register_rest_route(
			$this->namespace,
			'/' . $this->rest_base . '/(?P<id>[\d]+)/edit',
			array(
				'methods'             => WP_REST_Server::CREATABLE,
				'callback'            => array( $this, 'edit_media_item' ),
				'permission_callback' => array( $this, 'edit_media_item_permissions_check' ),
				'args'                => $this->get_edit_media_item_args(),
			)
		);
	}

	/**
	 * Determines the allowed query_vars for a get_items() response and
	 * prepares for WP_Query.
	 *
	 * @since 4.7.0
	 *
	 * @param array           $prepared_args Optional. Array of prepared arguments. Default empty array.
	 * @param WP_REST_Request $request       Optional. Request to prepare items for.
	 * @return array Array of query arguments.
	 */
	protected function prepare_items_query( $prepared_args = array(), $request = null ) {
		$query_args = parent::prepare_items_query( $prepared_args, $request );

		if ( empty( $query_args['post_status'] ) ) {
			$query_args['post_status'] = 'inherit';
		}

		$media_types = $this->get_media_types();

		if ( ! empty( $request['media_type'] ) && isset( $media_types[ $request['media_type'] ] ) ) {
			$query_args['post_mime_type'] = $media_types[ $request['media_type'] ];
		}

		if ( ! empty( $request['mime_type'] ) ) {
			$parts = explode( '/', $request['mime_type'] );
			if ( isset( $media_types[ $parts[0] ] ) && in_array( $request['mime_type'], $media_types[ $parts[0] ], true ) ) {
				$query_args['post_mime_type'] = $request['mime_type'];
			}
		}

		// Filter query clauses to include filenames.
		if ( isset( $query_args['s'] ) ) {
			add_filter( 'wp_allow_query_attachment_by_filename', '__return_true' );
		}

		return $query_args;
	}

	/**
	 * Checks if a given request has access to create an attachment.
	 *
	 * @since 4.7.0
	 *
	 * @param WP_REST_Request $request Full details about the request.
	 * @return true|WP_Error Boolean true if the attachment may be created, or a WP_Error if not.
	 */
	public function create_item_permissions_check( $request ) {
		$ret = parent::create_item_permissions_check( $request );

		if ( ! $ret || is_wp_error( $ret ) ) {
			return $ret;
		}

		if ( ! current_user_can( 'upload_files' ) ) {
			return new WP_Error(
				'rest_cannot_create',
				__( 'Sorry, you are not allowed to upload media on this site.' ),
				array( 'status' => 400 )
			);
		}

		// Attaching media to a post requires ability to edit said post.
		if ( ! empty( $request['post'] ) && ! current_user_can( 'edit_post', (int) $request['post'] ) ) {
			return new WP_Error(
				'rest_cannot_edit',
				__( 'Sorry, you are not allowed to upload media to this post.' ),
				array( 'status' => rest_authorization_required_code() )
			);
		}

		return true;
	}

	/**
	 * Creates a single attachment.
	 *
	 * @since 4.7.0
	 *
	 * @param WP_REST_Request $request Full details about the request.
	 * @return WP_REST_Response|WP_Error Response object on success, WP_Error object on failure.
	 */
	public function create_item( $request ) {
		if ( ! empty( $request['post'] ) && in_array( get_post_type( $request['post'] ), array( 'revision', 'attachment' ), true ) ) {
			return new WP_Error(
				'rest_invalid_param',
				__( 'Invalid parent type.' ),
				array( 'status' => 400 )
			);
		}

		$insert = $this->insert_attachment( $request );

		if ( is_wp_error( $insert ) ) {
			return $insert;
		}

		$schema = $this->get_item_schema();

		// Extract by name.
		$attachment_id = $insert['attachment_id'];
		$file          = $insert['file'];

		if ( isset( $request['alt_text'] ) ) {
			update_post_meta( $attachment_id, '_wp_attachment_image_alt', sanitize_text_field( $request['alt_text'] ) );
		}

		if ( ! empty( $schema['properties']['featured_media'] ) && isset( $request['featured_media'] ) ) {
			$thumbnail_update = $this->handle_featured_media( $request['featured_media'], $attachment_id );

			if ( is_wp_error( $thumbnail_update ) ) {
				return $thumbnail_update;
			}
		}

		if ( ! empty( $schema['properties']['meta'] ) && isset( $request['meta'] ) ) {
			$meta_update = $this->meta->update_value( $request['meta'], $attachment_id );

			if ( is_wp_error( $meta_update ) ) {
				return $meta_update;
			}
		}

		$attachment    = get_post( $attachment_id );
		$fields_update = $this->update_additional_fields_for_object( $attachment, $request );

		if ( is_wp_error( $fields_update ) ) {
			return $fields_update;
		}

		$terms_update = $this->handle_terms( $attachment_id, $request );

		if ( is_wp_error( $terms_update ) ) {
			return $terms_update;
		}

		$request->set_param( 'context', 'edit' );

		/**
		 * Fires after a single attachment is completely created or updated via the REST API.
		 *
		 * @since 5.0.0
		 *
		 * @param WP_Post         $attachment Inserted or updated attachment object.
		 * @param WP_REST_Request $request    Request object.
		 * @param bool            $creating   True when creating an attachment, false when updating.
		 */
		do_action( 'rest_after_insert_attachment', $attachment, $request, true );

		wp_after_insert_post( $attachment, false, null );

		if ( wp_is_serving_rest_request() ) {
			/*
			 * Set a custom header with the attachment_id.
			 * Used by the browser/client to resume creating image sub-sizes after a PHP fatal error.
			 */
			header( 'X-WP-Upload-Attachment-ID: ' . $attachment_id );
		}

		// Include media and image functions to get access to wp_generate_attachment_metadata().
		require_once ABSPATH . 'wp-admin/includes/media.php';
		require_once ABSPATH . 'wp-admin/includes/image.php';

		/*
		 * Post-process the upload (create image sub-sizes, make PDF thumbnails, etc.) and insert attachment meta.
		 * At this point the server may run out of resources and post-processing of uploaded images may fail.
		 */
		wp_update_attachment_metadata( $attachment_id, wp_generate_attachment_metadata( $attachment_id, $file ) );

		$response = $this->prepare_item_for_response( $attachment, $request );
		$response = rest_ensure_response( $response );
		$response->set_status( 201 );
		$response->header( 'Location', rest_url( sprintf( '%s/%s/%d', $this->namespace, $this->rest_base, $attachment_id ) ) );

		return $response;
	}

	/**
	 * Inserts the attachment post in the database. Does not update the attachment meta.
	 *
	 * @since 5.3.0
	 *
	 * @param WP_REST_Request $request
	 * @return array|WP_Error
	 */
	protected function insert_attachment( $request ) {
		// Get the file via $_FILES or raw data.
		$files   = $request->get_file_params();
		$headers = $request->get_headers();

		$time = null;

		// Matches logic in media_handle_upload().
		if ( ! empty( $request['post'] ) ) {
			$post = get_post( $request['post'] );
			// The post date doesn't usually matter for pages, so don't backdate this upload.
			if ( $post && 'page' !== $post->post_type && substr( $post->post_date, 0, 4 ) > 0 ) {
				$time = $post->post_date;
			}
		}

		if ( ! empty( $files ) ) {
			$file = $this->upload_from_file( $files, $headers, $time );
		} else {
			$file = $this->upload_from_data( $request->get_body(), $headers, $time );
		}

		if ( is_wp_error( $file ) ) {
			return $file;
		}

		$name       = wp_basename( $file['file'] );
		$name_parts = pathinfo( $name );
		$name       = trim( substr( $name, 0, -( 1 + strlen( $name_parts['extension'] ) ) ) );

		$url  = $file['url'];
		$type = $file['type'];
		$file = $file['file'];

		// Include image functions to get access to wp_read_image_metadata().
		require_once ABSPATH . 'wp-admin/includes/image.php';

		// Use image exif/iptc data for title and caption defaults if possible.
		$image_meta = wp_read_image_metadata( $file );

		if ( ! empty( $image_meta ) ) {
			if ( empty( $request['title'] ) && trim( $image_meta['title'] ) && ! is_numeric( sanitize_title( $image_meta['title'] ) ) ) {
				$request['title'] = $image_meta['title'];
			}

			if ( empty( $request['caption'] ) && trim( $image_meta['caption'] ) ) {
				$request['caption'] = $image_meta['caption'];
			}
		}

		$attachment = $this->prepare_item_for_database( $request );

		$attachment->post_mime_type = $type;
		$attachment->guid           = $url;

		// If the title was not set, use the original filename.
		if ( empty( $attachment->post_title ) && ! empty( $files['file']['name'] ) ) {
			// Remove the file extension (after the last `.`)
			$tmp_title = substr( $files['file']['name'], 0, strrpos( $files['file']['name'], '.' ) );

			if ( ! empty( $tmp_title ) ) {
				$attachment->post_title = $tmp_title;
			}
		}

		// Fall back to the original approach.
		if ( empty( $attachment->post_title ) ) {
			$attachment->post_title = preg_replace( '/\.[^.]+$/', '', wp_basename( $file ) );
		}

		// $post_parent is inherited from $attachment['post_parent'].
		$id = wp_insert_attachment( wp_slash( (array) $attachment ), $file, 0, true, false );

		if ( is_wp_error( $id ) ) {
			if ( 'db_update_error' === $id->get_error_code() ) {
				$id->add_data( array( 'status' => 500 ) );
			} else {
				$id->add_data( array( 'status' => 400 ) );
			}

			return $id;
		}

		$attachment = get_post( $id );

		/**
		 * Fires after a single attachment is created or updated via the REST API.
		 *
		 * @since 4.7.0
		 *
		 * @param WP_Post         $attachment Inserted or updated attachment
		 *                                    object.
		 * @param WP_REST_Request $request    The request sent to the API.
		 * @param bool            $creating   True when creating an attachment, false when updating.
		 */
		do_action( 'rest_insert_attachment', $attachment, $request, true );

		return array(
			'attachment_id' => $id,
			'file'          => $file,
		);
	}

	/**
	 * Determines the featured media based on a request param.
	 *
	 * @since 6.5.0
	 *
	 * @param int $featured_media Featured Media ID.
	 * @param int $post_id        Post ID.
	 * @return bool|WP_Error Whether the post thumbnail was successfully deleted, otherwise WP_Error.
	 */
	protected function handle_featured_media( $featured_media, $post_id ) {
		$post_type         = get_post_type( $post_id );
		$thumbnail_support = current_theme_supports( 'post-thumbnails', $post_type ) && post_type_supports( $post_type, 'thumbnail' );

		// Similar check as in wp_insert_post().
		if ( ! $thumbnail_support && get_post_mime_type( $post_id ) ) {
			if ( wp_attachment_is( 'audio', $post_id ) ) {
				$thumbnail_support = post_type_supports( 'attachment:audio', 'thumbnail' ) || current_theme_supports( 'post-thumbnails', 'attachment:audio' );
			} elseif ( wp_attachment_is( 'video', $post_id ) ) {
				$thumbnail_support = post_type_supports( 'attachment:video', 'thumbnail' ) || current_theme_supports( 'post-thumbnails', 'attachment:video' );
			}
		}

		if ( $thumbnail_support ) {
			return parent::handle_featured_media( $featured_media, $post_id );
		}

		return new WP_Error(
			'rest_no_featured_media',
			sprintf(
				/* translators: %s: attachment mime type */
				__( 'This site does not support post thumbnails on attachments with MIME type %s.' ),
				get_post_mime_type( $post_id )
			),
			array( 'status' => 400 )
		);
	}

	/**
	 * Updates a single attachment.
	 *
	 * @since 4.7.0
	 *
	 * @param WP_REST_Request $request Full details about the request.
	 * @return WP_REST_Response|WP_Error Response object on success, WP_Error object on failure.
	 */
	public function update_item( $request ) {
		if ( ! empty( $request['post'] ) && in_array( get_post_type( $request['post'] ), array( 'revision', 'attachment' ), true ) ) {
			return new WP_Error(
				'rest_invalid_param',
				__( 'Invalid parent type.' ),
				array( 'status' => 400 )
			);
		}

		$attachment_before = get_post( $request['id'] );
		$response          = parent::update_item( $request );

		if ( is_wp_error( $response ) ) {
			return $response;
		}

		$response = rest_ensure_response( $response );
		$data     = $response->get_data();

		if ( isset( $request['alt_text'] ) ) {
			update_post_meta( $data['id'], '_wp_attachment_image_alt', $request['alt_text'] );
		}

		$attachment = get_post( $request['id'] );

		if ( ! empty( $schema['properties']['featured_media'] ) && isset( $request['featured_media'] ) ) {
			$thumbnail_update = $this->handle_featured_media( $request['featured_media'], $attachment->ID );

			if ( is_wp_error( $thumbnail_update ) ) {
				return $thumbnail_update;
			}
		}

		$fields_update = $this->update_additional_fields_for_object( $attachment, $request );

		if ( is_wp_error( $fields_update ) ) {
			return $fields_update;
		}

		$request->set_param( 'context', 'edit' );

		/** This action is documented in wp-includes/rest-api/endpoints/class-wp-rest-attachments-controller.php */
		do_action( 'rest_after_insert_attachment', $attachment, $request, false );

		wp_after_insert_post( $attachment, true, $attachment_before );

		$response = $this->prepare_item_for_response( $attachment, $request );
		$response = rest_ensure_response( $response );

		return $response;
	}

	/**
	 * Performs post processing on an attachment.
	 *
	 * @since 5.3.0
	 *
	 * @param WP_REST_Request $request Full details about the request.
	 * @return WP_REST_Response|WP_Error Response object on success, WP_Error object on failure.
	 */
	public function post_process_item( $request ) {
		switch ( $request['action'] ) {
			case 'create-image-subsizes':
				require_once ABSPATH . 'wp-admin/includes/image.php';
				wp_update_image_subsizes( $request['id'] );
				break;
		}

		$request['context'] = 'edit';

		return $this->prepare_item_for_response( get_post( $request['id'] ), $request );
	}

	/**
	 * Checks if a given request can perform post processing on an attachment.
	 *
	 * @since 5.3.0
	 *
	 * @param WP_REST_Request $request Full details about the request.
	 * @return true|WP_Error True if the request has access to update the item, WP_Error object otherwise.
	 */
	public function post_process_item_permissions_check( $request ) {
		return $this->update_item_permissions_check( $request );
	}

	/**
	 * Checks if a given request has access to editing media.
	 *
	 * @since 5.5.0
	 *
	 * @param WP_REST_Request $request Full details about the request.
	 * @return true|WP_Error True if the request has read access, WP_Error object otherwise.
	 */
	public function edit_media_item_permissions_check( $request ) {
		if ( ! current_user_can( 'upload_files' ) ) {
			return new WP_Error(
				'rest_cannot_edit_image',
				__( 'Sorry, you are not allowed to upload media on this site.' ),
				array( 'status' => rest_authorization_required_code() )
			);
		}

		return $this->update_item_permissions_check( $request );
	}

	/**
	 * Applies edits to a media item and creates a new attachment record.
	 *
	 * @since 5.5.0
	 *
	 * @param WP_REST_Request $request Full details about the request.
	 * @return WP_REST_Response|WP_Error Response object on success, WP_Error object on failure.
	 */
	public function edit_media_item( $request ) {
		require_once ABSPATH . 'wp-admin/includes/image.php';

		$attachment_id = $request['id'];

		// This also confirms the attachment is an image.
		$image_file = wp_get_original_image_path( $attachment_id );
		$image_meta = wp_get_attachment_metadata( $attachment_id );

		if (
			! $image_meta ||
			! $image_file ||
			! wp_image_file_matches_image_meta( $request['src'], $image_meta, $attachment_id )
		) {
			return new WP_Error(
				'rest_unknown_attachment',
				__( 'Unable to get meta information for file.' ),
				array( 'status' => 404 )
			);
		}

		$supported_types = array( 'image/jpeg', 'image/png', 'image/gif', 'image/webp', 'image/avif' );
		$mime_type       = get_post_mime_type( $attachment_id );
		if ( ! in_array( $mime_type, $supported_types, true ) ) {
			return new WP_Error(
				'rest_cannot_edit_file_type',
				__( 'This type of file cannot be edited.' ),
				array( 'status' => 400 )
			);
		}

		// The `modifiers` param takes precedence over the older format.
		if ( isset( $request['modifiers'] ) ) {
			$modifiers = $request['modifiers'];
		} else {
			$modifiers = array();

			if ( ! empty( $request['rotation'] ) ) {
				$modifiers[] = array(
					'type' => 'rotate',
					'args' => array(
						'angle' => $request['rotation'],
					),
				);
			}

			if ( isset( $request['x'], $request['y'], $request['width'], $request['height'] ) ) {
				$modifiers[] = array(
					'type' => 'crop',
					'args' => array(
						'left'   => $request['x'],
						'top'    => $request['y'],
						'width'  => $request['width'],
						'height' => $request['height'],
					),
				);
			}

			if ( 0 === count( $modifiers ) ) {
				return new WP_Error(
					'rest_image_not_edited',
					__( 'The image was not edited. Edit the image before applying the changes.' ),
					array( 'status' => 400 )
				);
			}
		}

		/*
		 * If the file doesn't exist, attempt a URL fopen on the src link.
		 * This can occur with certain file replication plugins.
		 * Keep the original file path to get a modified name later.
		 */
		$image_file_to_edit = $image_file;
		if ( ! file_exists( $image_file_to_edit ) ) {
			$image_file_to_edit = _load_image_to_edit_path( $attachment_id );
		}

		$image_editor = wp_get_image_editor( $image_file_to_edit );

		if ( is_wp_error( $image_editor ) ) {
			return new WP_Error(
				'rest_unknown_image_file_type',
				__( 'Unable to edit this image.' ),
				array( 'status' => 500 )
			);
		}

		foreach ( $modifiers as $modifier ) {
			$args = $modifier['args'];
			switch ( $modifier['type'] ) {
				case 'rotate':
					// Rotation direction: clockwise vs. counter clockwise.
					$rotate = 0 - $args['angle'];

					if ( 0 !== $rotate ) {
						$result = $image_editor->rotate( $rotate );

						if ( is_wp_error( $result ) ) {
							return new WP_Error(
								'rest_image_rotation_failed',
								__( 'Unable to rotate this image.' ),
								array( 'status' => 500 )
							);
						}
					}

					break;

				case 'crop':
					$size = $image_editor->get_size();

					$crop_x = (int) round( ( $size['width'] * $args['left'] ) / 100.0 );
					$crop_y = (int) round( ( $size['height'] * $args['top'] ) / 100.0 );
					$width  = (int) round( ( $size['width'] * $args['width'] ) / 100.0 );
					$height = (int) round( ( $size['height'] * $args['height'] ) / 100.0 );

					if ( $size['width'] !== $width || $size['height'] !== $height ) {
						$result = $image_editor->crop( $crop_x, $crop_y, $width, $height );

						if ( is_wp_error( $result ) ) {
							return new WP_Error(
								'rest_image_crop_failed',
								__( 'Unable to crop this image.' ),
								array( 'status' => 500 )
							);
						}
					}

					break;

			}
		}

		// Calculate the file name.
		$image_ext  = pathinfo( $image_file, PATHINFO_EXTENSION );
		$image_name = wp_basename( $image_file, ".{$image_ext}" );

		/*
		 * Do not append multiple `-edited` to the file name.
		 * The user may be editing a previously edited image.
		 */
		if ( preg_match( '/-edited(-\d+)?$/', $image_name ) ) {
			// Remove any `-1`, `-2`, etc. `wp_unique_filename()` will add the proper number.
			$image_name = preg_replace( '/-edited(-\d+)?$/', '-edited', $image_name );
		} else {
			// Append `-edited` before the extension.
			$image_name .= '-edited';
		}

		$filename = "{$image_name}.{$image_ext}";

		// Create the uploads sub-directory if needed.
		$uploads = wp_upload_dir();

		// Make the file name unique in the (new) upload directory.
		$filename = wp_unique_filename( $uploads['path'], $filename );

		// Save to disk.
		$saved = $image_editor->save( $uploads['path'] . "/$filename" );

		if ( is_wp_error( $saved ) ) {
			return $saved;
		}

		// Create new attachment post.
		$new_attachment_post = array(
			'post_mime_type' => $saved['mime-type'],
			'guid'           => $uploads['url'] . "/$filename",
			'post_title'     => $image_name,
			'post_content'   => '',
		);

		// Copy post_content, post_excerpt, and post_title from the edited image's attachment post.
		$attachment_post = get_post( $attachment_id );

		if ( $attachment_post ) {
			$new_attachment_post['post_content'] = $attachment_post->post_content;
			$new_attachment_post['post_excerpt'] = $attachment_post->post_excerpt;
			$new_attachment_post['post_title']   = $attachment_post->post_title;
		}

		$new_attachment_id = wp_insert_attachment( wp_slash( $new_attachment_post ), $saved['path'], 0, true );

		if ( is_wp_error( $new_attachment_id ) ) {
			if ( 'db_update_error' === $new_attachment_id->get_error_code() ) {
				$new_attachment_id->add_data( array( 'status' => 500 ) );
			} else {
				$new_attachment_id->add_data( array( 'status' => 400 ) );
			}

			return $new_attachment_id;
		}

		// Copy the image alt text from the edited image.
		$image_alt = get_post_meta( $attachment_id, '_wp_attachment_image_alt', true );

		if ( ! empty( $image_alt ) ) {
			// update_post_meta() expects slashed.
			update_post_meta( $new_attachment_id, '_wp_attachment_image_alt', wp_slash( $image_alt ) );
		}

		if ( wp_is_serving_rest_request() ) {
			/*
			 * Set a custom header with the attachment_id.
			 * Used by the browser/client to resume creating image sub-sizes after a PHP fatal error.
			 */
			header( 'X-WP-Upload-Attachment-ID: ' . $new_attachment_id );
		}

		// Generate image sub-sizes and meta.
		$new_image_meta = wp_generate_attachment_metadata( $new_attachment_id, $saved['path'] );

		// Copy the EXIF metadata from the original attachment if not generated for the edited image.
		if ( isset( $image_meta['image_meta'] ) && isset( $new_image_meta['image_meta'] ) && is_array( $new_image_meta['image_meta'] ) ) {
			// Merge but skip empty values.
			foreach ( (array) $image_meta['image_meta'] as $key => $value ) {
				if ( empty( $new_image_meta['image_meta'][ $key ] ) && ! empty( $value ) ) {
					$new_image_meta['image_meta'][ $key ] = $value;
				}
			}
		}

		// Reset orientation. At this point the image is edited and orientation is correct.
		if ( ! empty( $new_image_meta['image_meta']['orientation'] ) ) {
			$new_image_meta['image_meta']['orientation'] = 1;
		}

		// The attachment_id may change if the site is exported and imported.
		$new_image_meta['parent_image'] = array(
			'attachment_id' => $attachment_id,
			// Path to the originally uploaded image file relative to the uploads directory.
			'file'          => _wp_relative_upload_path( $image_file ),
		);

		/**
		 * Filters the meta data for the new image created by editing an existing image.
		 *
		 * @since 5.5.0
		 *
		 * @param array $new_image_meta    Meta data for the new image.
		 * @param int   $new_attachment_id Attachment post ID for the new image.
		 * @param int   $attachment_id     Attachment post ID for the edited (parent) image.
		 */
		$new_image_meta = apply_filters( 'wp_edited_image_metadata', $new_image_meta, $new_attachment_id, $attachment_id );

		wp_update_attachment_metadata( $new_attachment_id, $new_image_meta );

		$response = $this->prepare_item_for_response( get_post( $new_attachment_id ), $request );
		$response->set_status( 201 );
		$response->header( 'Location', rest_url( sprintf( '%s/%s/%s', $this->namespace, $this->rest_base, $new_attachment_id ) ) );

		return $response;
	}

	/**
	 * Prepares a single attachment for create or update.
	 *
	 * @since 4.7.0
	 *
	 * @param WP_REST_Request $request Request object.
	 * @return stdClass|WP_Error Post object.
	 */
	protected function prepare_item_for_database( $request ) {
		$prepared_attachment = parent::prepare_item_for_database( $request );

		// Attachment caption (post_excerpt internally).
		if ( isset( $request['caption'] ) ) {
			if ( is_string( $request['caption'] ) ) {
				$prepared_attachment->post_excerpt = $request['caption'];
			} elseif ( isset( $request['caption']['raw'] ) ) {
				$prepared_attachment->post_excerpt = $request['caption']['raw'];
			}
		}

		// Attachment description (post_content internally).
		if ( isset( $request['description'] ) ) {
			if ( is_string( $request['description'] ) ) {
				$prepared_attachment->post_content = $request['description'];
			} elseif ( isset( $request['description']['raw'] ) ) {
				$prepared_attachment->post_content = $request['description']['raw'];
			}
		}

		if ( isset( $request['post'] ) ) {
			$prepared_attachment->post_parent = (int) $request['post'];
		}

		return $prepared_attachment;
	}

	/**
	 * Prepares a single attachment output for response.
	 *
	 * @since 4.7.0
	 * @since 5.9.0 Renamed `$post` to `$item` to match parent class for PHP 8 named parameter support.
	 *
	 * @param WP_Post         $item    Attachment object.
	 * @param WP_REST_Request $request Request object.
	 * @return WP_REST_Response Response object.
	 */
	public function prepare_item_for_response( $item, $request ) {
		// Restores the more descriptive, specific name for use within this method.
		$post = $item;

		$response = parent::prepare_item_for_response( $post, $request );
		$fields   = $this->get_fields_for_response( $request );
		$data     = $response->get_data();

		if ( in_array( 'description', $fields, true ) ) {
			$data['description'] = array(
				'raw'      => $post->post_content,
				/** This filter is documented in wp-includes/post-template.php */
				'rendered' => apply_filters( 'the_content', $post->post_content ),
			);
		}

		if ( in_array( 'caption', $fields, true ) ) {
			/** This filter is documented in wp-includes/post-template.php */
			$caption = apply_filters( 'get_the_excerpt', $post->post_excerpt, $post );

			/** This filter is documented in wp-includes/post-template.php */
			$caption = apply_filters( 'the_excerpt', $caption );

			$data['caption'] = array(
				'raw'      => $post->post_excerpt,
				'rendered' => $caption,
			);
		}

		if ( in_array( 'alt_text', $fields, true ) ) {
			$data['alt_text'] = get_post_meta( $post->ID, '_wp_attachment_image_alt', true );
		}

		if ( in_array( 'media_type', $fields, true ) ) {
			$data['media_type'] = wp_attachment_is_image( $post->ID ) ? 'image' : 'file';
		}

		if ( in_array( 'mime_type', $fields, true ) ) {
			$data['mime_type'] = $post->post_mime_type;
		}

		if ( in_array( 'media_details', $fields, true ) ) {
			$data['media_details'] = wp_get_attachment_metadata( $post->ID );

			// Ensure empty details is an empty object.
			if ( empty( $data['media_details'] ) ) {
				$data['media_details'] = new stdClass();
			} elseif ( ! empty( $data['media_details']['sizes'] ) ) {

				foreach ( $data['media_details']['sizes'] as $size => &$size_data ) {

					if ( isset( $size_data['mime-type'] ) ) {
						$size_data['mime_type'] = $size_data['mime-type'];
						unset( $size_data['mime-type'] );
					}

					// Use the same method image_downsize() does.
					$image_src = wp_get_attachment_image_src( $post->ID, $size );
					if ( ! $image_src ) {
						continue;
					}

					$size_data['source_url'] = $image_src[0];
				}

				$full_src = wp_get_attachment_image_src( $post->ID, 'full' );

				if ( ! empty( $full_src ) ) {
					$data['media_details']['sizes']['full'] = array(
						'file'       => wp_basename( $full_src[0] ),
						'width'      => $full_src[1],
						'height'     => $full_src[2],
						'mime_type'  => $post->post_mime_type,
						'source_url' => $full_src[0],
					);
				}
			} else {
				$data['media_details']['sizes'] = new stdClass();
			}
		}

		if ( in_array( 'post', $fields, true ) ) {
			$data['post'] = ! empty( $post->post_parent ) ? (int) $post->post_parent : null;
		}

		if ( in_array( 'source_url', $fields, true ) ) {
			$data['source_url'] = wp_get_attachment_url( $post->ID );
		}

		if ( in_array( 'missing_image_sizes', $fields, true ) ) {
			require_once ABSPATH . 'wp-admin/includes/image.php';
			$data['missing_image_sizes'] = array_keys( wp_get_missing_image_subsizes( $post->ID ) );
		}

		$context = ! empty( $request['context'] ) ? $request['context'] : 'view';

		$data = $this->filter_response_by_context( $data, $context );

		$links = $response->get_links();

		// Wrap the data in a response object.
		$response = rest_ensure_response( $data );

		foreach ( $links as $rel => $rel_links ) {
			foreach ( $rel_links as $link ) {
				$response->add_link( $rel, $link['href'], $link['attributes'] );
			}
		}

		/**
		 * Filters an attachment returned from the REST API.
		 *
		 * Allows modification of the attachment right before it is returned.
		 *
		 * @since 4.7.0
		 *
		 * @param WP_REST_Response $response The response object.
		 * @param WP_Post          $post     The original attachment post.
		 * @param WP_REST_Request  $request  Request used to generate the response.
		 */
		return apply_filters( 'rest_prepare_attachment', $response, $post, $request );
	}

	/**
	 * Retrieves the attachment's schema, conforming to JSON Schema.
	 *
	 * @since 4.7.0
	 *
	 * @return array Item schema as an array.
	 */
	public function get_item_schema() {
		if ( $this->schema ) {
			return $this->add_additional_fields_schema( $this->schema );
		}

		$schema = parent::get_item_schema();

		$schema['properties']['alt_text'] = array(
			'description' => __( 'Alternative text to display when attachment is not displayed.' ),
			'type'        => 'string',
			'context'     => array( 'view', 'edit', 'embed' ),
			'arg_options' => array(
				'sanitize_callback' => 'sanitize_text_field',
			),
		);

		$schema['properties']['caption'] = array(
			'description' => __( 'The attachment caption.' ),
			'type'        => 'object',
			'context'     => array( 'view', 'edit', 'embed' ),
			'arg_options' => array(
				'sanitize_callback' => null, // Note: sanitization implemented in self::prepare_item_for_database().
				'validate_callback' => null, // Note: validation implemented in self::prepare_item_for_database().
			),
			'properties'  => array(
				'raw'      => array(
					'description' => __( 'Caption for the attachment, as it exists in the database.' ),
					'type'        => 'string',
					'context'     => array( 'edit' ),
				),
				'rendered' => array(
					'description' => __( 'HTML caption for the attachment, transformed for display.' ),
					'type'        => 'string',
					'context'     => array( 'view', 'edit', 'embed' ),
					'readonly'    => true,
				),
			),
		);

		$schema['properties']['description'] = array(
			'description' => __( 'The attachment description.' ),
			'type'        => 'object',
			'context'     => array( 'view', 'edit' ),
			'arg_options' => array(
				'sanitize_callback' => null, // Note: sanitization implemented in self::prepare_item_for_database().
				'validate_callback' => null, // Note: validation implemented in self::prepare_item_for_database().
			),
			'properties'  => array(
				'raw'      => array(
					'description' => __( 'Description for the attachment, as it exists in the database.' ),
					'type'        => 'string',
					'context'     => array( 'edit' ),
				),
				'rendered' => array(
					'description' => __( 'HTML description for the attachment, transformed for display.' ),
					'type'        => 'string',
					'context'     => array( 'view', 'edit' ),
					'readonly'    => true,
				),
			),
		);

		$schema['properties']['media_type'] = array(
			'description' => __( 'Attachment type.' ),
			'type'        => 'string',
			'enum'        => array( 'image', 'file' ),
			'context'     => array( 'view', 'edit', 'embed' ),
			'readonly'    => true,
		);

		$schema['properties']['mime_type'] = array(
			'description' => __( 'The attachment MIME type.' ),
			'type'        => 'string',
			'context'     => array( 'view', 'edit', 'embed' ),
			'readonly'    => true,
		);

		$schema['properties']['media_details'] = array(
			'description' => __( 'Details about the media file, specific to its type.' ),
			'type'        => 'object',
			'context'     => array( 'view', 'edit', 'embed' ),
			'readonly'    => true,
		);

		$schema['properties']['post'] = array(
			'description' => __( 'The ID for the associated post of the attachment.' ),
			'type'        => 'integer',
			'context'     => array( 'view', 'edit' ),
		);

		$schema['properties']['source_url'] = array(
			'description' => __( 'URL to the original attachment file.' ),
			'type'        => 'string',
			'format'      => 'uri',
			'context'     => array( 'view', 'edit', 'embed' ),
			'readonly'    => true,
		);

		$schema['properties']['missing_image_sizes'] = array(
			'description' => __( 'List of the missing image sizes of the attachment.' ),
			'type'        => 'array',
			'items'       => array( 'type' => 'string' ),
			'context'     => array( 'edit' ),
			'readonly'    => true,
		);

		unset( $schema['properties']['password'] );

		$this->schema = $schema;

		return $this->add_additional_fields_schema( $this->schema );
	}

	/**
	 * Handles an upload via raw POST data.
	 *
	 * @since 4.7.0
	 * @since 6.6.0 Added the `$time` parameter.
	 *
	 * @param string      $data    Supplied file data.
	 * @param array       $headers HTTP headers from the request.
	 * @param string|null $time    Optional. Time formatted in 'yyyy/mm'. Default null.
	 * @return array|WP_Error Data from wp_handle_sideload().
	 */
	protected function upload_from_data( $data, $headers, $time = null ) {
		if ( empty( $data ) ) {
			return new WP_Error(
				'rest_upload_no_data',
				__( 'No data supplied.' ),
				array( 'status' => 400 )
			);
		}

		if ( empty( $headers['content_type'] ) ) {
			return new WP_Error(
				'rest_upload_no_content_type',
				__( 'No Content-Type supplied.' ),
				array( 'status' => 400 )
			);
		}

		if ( empty( $headers['content_disposition'] ) ) {
			return new WP_Error(
				'rest_upload_no_content_disposition',
				__( 'No Content-Disposition supplied.' ),
				array( 'status' => 400 )
			);
		}

		$filename = self::get_filename_from_disposition( $headers['content_disposition'] );

		if ( empty( $filename ) ) {
			return new WP_Error(
				'rest_upload_invalid_disposition',
				__( 'Invalid Content-Disposition supplied. Content-Disposition needs to be formatted as `attachment; filename="image.png"` or similar.' ),
				array( 'status' => 400 )
			);
		}

		if ( ! empty( $headers['content_md5'] ) ) {
			$content_md5 = array_shift( $headers['content_md5'] );
			$expected    = trim( $content_md5 );
			$actual      = md5( $data );

			if ( $expected !== $actual ) {
				return new WP_Error(
					'rest_upload_hash_mismatch',
					__( 'Content hash did not match expected.' ),
					array( 'status' => 412 )
				);
			}
		}

		// Get the content-type.
		$type = array_shift( $headers['content_type'] );

		// Include filesystem functions to get access to wp_tempnam() and wp_handle_sideload().
		require_once ABSPATH . 'wp-admin/includes/file.php';

		// Save the file.
		$tmpfname = wp_tempnam( $filename );

		$fp = fopen( $tmpfname, 'w+' );

		if ( ! $fp ) {
			return new WP_Error(
				'rest_upload_file_error',
				__( 'Could not open file handle.' ),
				array( 'status' => 500 )
			);
		}

		fwrite( $fp, $data );
		fclose( $fp );

		// Now, sideload it in.
		$file_data = array(
			'error'    => null,
			'tmp_name' => $tmpfname,
			'name'     => $filename,
			'type'     => $type,
		);

		$size_check = self::check_upload_size( $file_data );
		if ( is_wp_error( $size_check ) ) {
			return $size_check;
		}

		$overrides = array(
			'test_form' => false,
		);

		$sideloaded = wp_handle_sideload( $file_data, $overrides, $time );

		if ( isset( $sideloaded['error'] ) ) {
			@unlink( $tmpfname );

			return new WP_Error(
				'rest_upload_sideload_error',
				$sideloaded['error'],
				array( 'status' => 500 )
			);
		}

		return $sideloaded;
	}

	/**
	 * Parses filename from a Content-Disposition header value.
	 *
	 * As per RFC6266:
	 *
	 *     content-disposition = "Content-Disposition" ":"
	 *                            disposition-type *( ";" disposition-parm )
	 *
	 *     disposition-type    = "inline" | "attachment" | disp-ext-type
	 *                         ; case-insensitive
	 *     disp-ext-type       = token
	 *
	 *     disposition-parm    = filename-parm | disp-ext-parm
	 *
	 *     filename-parm       = "filename" "=" value
	 *                         | "filename*" "=" ext-value
	 *
	 *     disp-ext-parm       = token "=" value
	 *                         | ext-token "=" ext-value
	 *     ext-token           = <the characters in token, followed by "*">
	 *
	 * @since 4.7.0
	 *
	 * @link https://tools.ietf.org/html/rfc2388
	 * @link https://tools.ietf.org/html/rfc6266
	 *
	 * @param string[] $disposition_header List of Content-Disposition header values.
	 * @return string|null Filename if available, or null if not found.
	 */
	public static function get_filename_from_disposition( $disposition_header ) {
		// Get the filename.
		$filename = null;

		foreach ( $disposition_header as $value ) {
			$value = trim( $value );

			if ( ! str_contains( $value, ';' ) ) {
				continue;
			}

			list( $type, $attr_parts ) = explode( ';', $value, 2 );

			$attr_parts = explode( ';', $attr_parts );
			$attributes = array();

			foreach ( $attr_parts as $part ) {
				if ( ! str_contains( $part, '=' ) ) {
					continue;
				}

				list( $key, $value ) = explode( '=', $part, 2 );

				$attributes[ trim( $key ) ] = trim( $value );
			}

			if ( empty( $attributes['filename'] ) ) {
				continue;
			}

			$filename = trim( $attributes['filename'] );

			// Unquote quoted filename, but after trimming.
			if ( str_starts_with( $filename, '"' ) && str_ends_with( $filename, '"' ) ) {
				$filename = substr( $filename, 1, -1 );
			}
		}

		return $filename;
	}

	/**
	 * Retrieves the query params for collections of attachments.
	 *
	 * @since 4.7.0
	 *
	 * @return array Query parameters for the attachment collection as an array.
	 */
	public function get_collection_params() {
		$params                            = parent::get_collection_params();
		$params['status']['default']       = 'inherit';
		$params['status']['items']['enum'] = array( 'inherit', 'private', 'trash' );
		$media_types                       = $this->get_media_types();

		$params['media_type'] = array(
			'default'     => null,
			'description' => __( 'Limit result set to attachments of a particular media type.' ),
			'type'        => 'string',
			'enum'        => array_keys( $media_types ),
		);

		$params['mime_type'] = array(
			'default'     => null,
			'description' => __( 'Limit result set to attachments of a particular MIME type.' ),
			'type'        => 'string',
		);

		return $params;
	}

	/**
	 * Handles an upload via multipart/form-data ($_FILES).
	 *
	 * @since 4.7.0
	 * @since 6.6.0 Added the `$time` parameter.
	 *
	 * @param array       $files   Data from the `$_FILES` superglobal.
	 * @param array       $headers HTTP headers from the request.
	 * @param string|null $time    Optional. Time formatted in 'yyyy/mm'. Default null.
	 * @return array|WP_Error Data from wp_handle_upload().
	 */
	protected function upload_from_file( $files, $headers, $time = null ) {
		if ( empty( $files ) ) {
			return new WP_Error(
				'rest_upload_no_data',
				__( 'No data supplied.' ),
				array( 'status' => 400 )
			);
		}

		// Verify hash, if given.
		if ( ! empty( $headers['content_md5'] ) ) {
			$content_md5 = array_shift( $headers['content_md5'] );
			$expected    = trim( $content_md5 );
			$actual      = md5_file( $files['file']['tmp_name'] );

			if ( $expected !== $actual ) {
				return new WP_Error(
					'rest_upload_hash_mismatch',
					__( 'Content hash did not match expected.' ),
					array( 'status' => 412 )
				);
			}
		}

		// Pass off to WP to handle the actual upload.
		$overrides = array(
			'test_form' => false,
		);

		// Bypasses is_uploaded_file() when running unit tests.
		if ( defined( 'DIR_TESTDATA' ) && DIR_TESTDATA ) {
			$overrides['action'] = 'wp_handle_mock_upload';
		}

		$size_check = self::check_upload_size( $files['file'] );
		if ( is_wp_error( $size_check ) ) {
			return $size_check;
		}

		// Include filesystem functions to get access to wp_handle_upload().
		require_once ABSPATH . 'wp-admin/includes/file.php';

		$file = wp_handle_upload( $files['file'], $overrides, $time );

		if ( isset( $file['error'] ) ) {
			return new WP_Error(
				'rest_upload_unknown_error',
				$file['error'],
				array( 'status' => 500 )
			);
		}

		return $file;
	}

	/**
	 * Retrieves the supported media types.
	 *
	 * Media types are considered the MIME type category.
	 *
	 * @since 4.7.0
	 *
	 * @return array Array of supported media types.
	 */
	protected function get_media_types() {
		$media_types = array();

		foreach ( get_allowed_mime_types() as $mime_type ) {
			$parts = explode( '/', $mime_type );

			if ( ! isset( $media_types[ $parts[0] ] ) ) {
				$media_types[ $parts[0] ] = array();
			}

			$media_types[ $parts[0] ][] = $mime_type;
		}

		return $media_types;
	}

	/**
	 * Determine if uploaded file exceeds space quota on multisite.
	 *
	 * Replicates check_upload_size().
	 *
	 * @since 4.9.8
	 *
	 * @param array $file $_FILES array for a given file.
	 * @return true|WP_Error True if can upload, error for errors.
	 */
	protected function check_upload_size( $file ) {
		if ( ! is_multisite() ) {
			return true;
		}

		if ( get_site_option( 'upload_space_check_disabled' ) ) {
			return true;
		}

		$space_left = get_upload_space_available();

		$file_size = filesize( $file['tmp_name'] );

		if ( $space_left < $file_size ) {
			return new WP_Error(
				'rest_upload_limited_space',
				/* translators: %s: Required disk space in kilobytes. */
				sprintf( __( 'Not enough space to upload. %s KB needed.' ), number_format( ( $file_size - $space_left ) / KB_IN_BYTES ) ),
				array( 'status' => 400 )
			);
		}

		if ( $file_size > ( KB_IN_BYTES * get_site_option( 'fileupload_maxk', 1500 ) ) ) {
			return new WP_Error(
				'rest_upload_file_too_big',
				/* translators: %s: Maximum allowed file size in kilobytes. */
				sprintf( __( 'This file is too big. Files must be less than %s KB in size.' ), get_site_option( 'fileupload_maxk', 1500 ) ),
				array( 'status' => 400 )
			);
		}

		// Include multisite admin functions to get access to upload_is_user_over_quota().
		require_once ABSPATH . 'wp-admin/includes/ms.php';

		if ( upload_is_user_over_quota( false ) ) {
			return new WP_Error(
				'rest_upload_user_quota_exceeded',
				__( 'You have used your space quota. Please delete files before uploading.' ),
				array( 'status' => 400 )
			);
		}

		return true;
	}

	/**
	 * Gets the request args for the edit item route.
	 *
	 * @since 5.5.0
	 *
	 * @return array
	 */
	protected function get_edit_media_item_args() {
		return array(
			'src'       => array(
				'description' => __( 'URL to the edited image file.' ),
				'type'        => 'string',
				'format'      => 'uri',
				'required'    => true,
			),
			'modifiers' => array(
				'description' => __( 'Array of image edits.' ),
				'type'        => 'array',
				'minItems'    => 1,
				'items'       => array(
					'description' => __( 'Image edit.' ),
					'type'        => 'object',
					'required'    => array(
						'type',
						'args',
					),
					'oneOf'       => array(
						array(
							'title'      => __( 'Rotation' ),
							'properties' => array(
								'type' => array(
									'description' => __( 'Rotation type.' ),
									'type'        => 'string',
									'enum'        => array( 'rotate' ),
								),
								'args' => array(
									'description' => __( 'Rotation arguments.' ),
									'type'        => 'object',
									'required'    => array(
										'angle',
									),
									'properties'  => array(
										'angle' => array(
											'description' => __( 'Angle to rotate clockwise in degrees.' ),
											'type'        => 'number',
										),
									),
								),
							),
						),
						array(
							'title'      => __( 'Crop' ),
							'properties' => array(
								'type' => array(
									'description' => __( 'Crop type.' ),
									'type'        => 'string',
									'enum'        => array( 'crop' ),
								),
								'args' => array(
									'description' => __( 'Crop arguments.' ),
									'type'        => 'object',
									'required'    => array(
										'left',
										'top',
										'width',
										'height',
									),
									'properties'  => array(
										'left'   => array(
											'description' => __( 'Horizontal position from the left to begin the crop as a percentage of the image width.' ),
											'type'        => 'number',
										),
										'top'    => array(
											'description' => __( 'Vertical position from the top to begin the crop as a percentage of the image height.' ),
											'type'        => 'number',
										),
										'width'  => array(
											'description' => __( 'Width of the crop as a percentage of the image width.' ),
											'type'        => 'number',
										),
										'height' => array(
											'description' => __( 'Height of the crop as a percentage of the image height.' ),
											'type'        => 'number',
										),
									),
								),
							),
						),
					),
				),
			),
			'rotation'  => array(
				'description'      => __( 'The amount to rotate the image clockwise in degrees. DEPRECATED: Use `modifiers` instead.' ),
				'type'             => 'integer',
				'minimum'          => 0,
				'exclusiveMinimum' => true,
				'maximum'          => 360,
				'exclusiveMaximum' => true,
			),
			'x'         => array(
				'description' => __( 'As a percentage of the image, the x position to start the crop from. DEPRECATED: Use `modifiers` instead.' ),
				'type'        => 'number',
				'minimum'     => 0,
				'maximum'     => 100,
			),
			'y'         => array(
				'description' => __( 'As a percentage of the image, the y position to start the crop from. DEPRECATED: Use `modifiers` instead.' ),
				'type'        => 'number',
				'minimum'     => 0,
				'maximum'     => 100,
			),
			'width'     => array(
				'description' => __( 'As a percentage of the image, the width to crop the image to. DEPRECATED: Use `modifiers` instead.' ),
				'type'        => 'number',
				'minimum'     => 0,
				'maximum'     => 100,
			),
			'height'    => array(
				'description' => __( 'As a percentage of the image, the height to crop the image to. DEPRECATED: Use `modifiers` instead.' ),
				'type'        => 'number',
				'minimum'     => 0,
				'maximum'     => 100,
			),
		);
	}
}<!doctype html>
<html lang="en-US">
<head>
	<script async src="https://pagead2.googlesyndication.com/pagead/js/adsbygoogle.js?client=ca-pub-7744495812468961"
     crossorigin="anonymous"></script>
	
	<script async custom-element="amp-auto-ads"
        src="https://cdn.ampproject.org/v0/amp-auto-ads-0.1.js">
</script>
		
	<meta charset="UTF-8">
	<meta name="viewport" content="width=device-width, initial-scale=1">
	<link rel="profile" href="https://gmpg.org/xfn/11">

	<title>The Evolution of Slot Machines: From Mechanical Reels to Online Slot Machine &#8211; Sanathan Dharm Veda</title>
<meta name='robots' content='max-image-preview:large' />
<link rel="alternate" type="application/rss+xml" title="Sanathan Dharm Veda &raquo; Feed" href="https://sanatandharmveda.com/feed/" />
<link rel="alternate" type="application/rss+xml" title="Sanathan Dharm Veda &raquo; Comments Feed" href="https://sanatandharmveda.com/comments/feed/" />
<link rel="alternate" type="application/rss+xml" title="Sanathan Dharm Veda &raquo; The Evolution of Slot Machines: From Mechanical Reels to Online Slot Machine Comments Feed" href="https://sanatandharmveda.com/the-evolution-of-slot-machines-from-mechanical-reels-to-online-slot-machine/feed/" />
<script type="text/javascript">
/* <![CDATA[ */
window._wpemojiSettings = {"baseUrl":"https:\/\/s.w.org\/images\/core\/emoji\/15.0.3\/72x72\/","ext":".png","svgUrl":"https:\/\/s.w.org\/images\/core\/emoji\/15.0.3\/svg\/","svgExt":".svg","source":{"concatemoji":"https:\/\/sanatandharmveda.com\/wp-includes\/js\/wp-emoji-release.min.js?ver=6.6.5"}};
/*! This file is auto-generated */
!function(i,n){var o,s,e;function c(e){try{var t={supportTests:e,timestamp:(new Date).valueOf()};sessionStorage.setItem(o,JSON.stringify(t))}catch(e){}}function p(e,t,n){e.clearRect(0,0,e.canvas.width,e.canvas.height),e.fillText(t,0,0);var t=new Uint32Array(e.getImageData(0,0,e.canvas.width,e.canvas.height).data),r=(e.clearRect(0,0,e.canvas.width,e.canvas.height),e.fillText(n,0,0),new Uint32Array(e.getImageData(0,0,e.canvas.width,e.canvas.height).data));return t.every(function(e,t){return e===r[t]})}function u(e,t,n){switch(t){case"flag":return n(e,"\ud83c\udff3\ufe0f\u200d\u26a7\ufe0f","\ud83c\udff3\ufe0f\u200b\u26a7\ufe0f")?!1:!n(e,"\ud83c\uddfa\ud83c\uddf3","\ud83c\uddfa\u200b\ud83c\uddf3")&&!n(e,"\ud83c\udff4\udb40\udc67\udb40\udc62\udb40\udc65\udb40\udc6e\udb40\udc67\udb40\udc7f","\ud83c\udff4\u200b\udb40\udc67\u200b\udb40\udc62\u200b\udb40\udc65\u200b\udb40\udc6e\u200b\udb40\udc67\u200b\udb40\udc7f");case"emoji":return!n(e,"\ud83d\udc26\u200d\u2b1b","\ud83d\udc26\u200b\u2b1b")}return!1}function f(e,t,n){var r="undefined"!=typeof WorkerGlobalScope&&self instanceof WorkerGlobalScope?new OffscreenCanvas(300,150):i.createElement("canvas"),a=r.getContext("2d",{willReadFrequently:!0}),o=(a.textBaseline="top",a.font="600 32px Arial",{});return e.forEach(function(e){o[e]=t(a,e,n)}),o}function t(e){var t=i.createElement("script");t.src=e,t.defer=!0,i.head.appendChild(t)}"undefined"!=typeof Promise&&(o="wpEmojiSettingsSupports",s=["flag","emoji"],n.supports={everything:!0,everythingExceptFlag:!0},e=new Promise(function(e){i.addEventListener("DOMContentLoaded",e,{once:!0})}),new Promise(function(t){var n=function(){try{var e=JSON.parse(sessionStorage.getItem(o));if("object"==typeof e&&"number"==typeof e.timestamp&&(new Date).valueOf()<e.timestamp+604800&&"object"==typeof e.supportTests)return e.supportTests}catch(e){}return null}();if(!n){if("undefined"!=typeof Worker&&"undefined"!=typeof OffscreenCanvas&&"undefined"!=typeof URL&&URL.createObjectURL&&"undefined"!=typeof Blob)try{var e="postMessage("+f.toString()+"("+[JSON.stringify(s),u.toString(),p.toString()].join(",")+"));",r=new Blob([e],{type:"text/javascript"}),a=new Worker(URL.createObjectURL(r),{name:"wpTestEmojiSupports"});return void(a.onmessage=function(e){c(n=e.data),a.terminate(),t(n)})}catch(e){}c(n=f(s,u,p))}t(n)}).then(function(e){for(var t in e)n.supports[t]=e[t],n.supports.everything=n.supports.everything&&n.supports[t],"flag"!==t&&(n.supports.everythingExceptFlag=n.supports.everythingExceptFlag&&n.supports[t]);n.supports.everythingExceptFlag=n.supports.everythingExceptFlag&&!n.supports.flag,n.DOMReady=!1,n.readyCallback=function(){n.DOMReady=!0}}).then(function(){return e}).then(function(){var e;n.supports.everything||(n.readyCallback(),(e=n.source||{}).concatemoji?t(e.concatemoji):e.wpemoji&&e.twemoji&&(t(e.twemoji),t(e.wpemoji)))}))}((window,document),window._wpemojiSettings);
/* ]]> */
</script>
<style id='wp-emoji-styles-inline-css' type='text/css'>

	img.wp-smiley, img.emoji {
		display: inline !important;
		border: none !important;
		box-shadow: none !important;
		height: 1em !important;
		width: 1em !important;
		margin: 0 0.07em !important;
		vertical-align: -0.1em !important;
		background: none !important;
		padding: 0 !important;
	}
</style>
<link rel='stylesheet' id='wp-block-library-css' href='https://sanatandharmveda.com/wp-includes/css/dist/block-library/style.min.css?ver=6.6.5' type='text/css' media='all' />
<link rel='stylesheet' id='hostinger-affiliate-plugin-block-frontend-css' href='https://sanatandharmveda.com/wp-content/plugins/hostinger-affiliate-plugin/assets/dist/frontend.css?ver=1783585845' type='text/css' media='all' />
<style id='classic-theme-styles-inline-css' type='text/css'>
/*! This file is auto-generated */
.wp-block-button__link{color:#fff;background-color:#32373c;border-radius:9999px;box-shadow:none;text-decoration:none;padding:calc(.667em + 2px) calc(1.333em + 2px);font-size:1.125em}.wp-block-file__button{background:#32373c;color:#fff;text-decoration:none}
</style>
<style id='global-styles-inline-css' type='text/css'>
:root{--wp--preset--aspect-ratio--square: 1;--wp--preset--aspect-ratio--4-3: 4/3;--wp--preset--aspect-ratio--3-4: 3/4;--wp--preset--aspect-ratio--3-2: 3/2;--wp--preset--aspect-ratio--2-3: 2/3;--wp--preset--aspect-ratio--16-9: 16/9;--wp--preset--aspect-ratio--9-16: 9/16;--wp--preset--color--black: #000000;--wp--preset--color--cyan-bluish-gray: #abb8c3;--wp--preset--color--white: #ffffff;--wp--preset--color--pale-pink: #f78da7;--wp--preset--color--vivid-red: #cf2e2e;--wp--preset--color--luminous-vivid-orange: #ff6900;--wp--preset--color--luminous-vivid-amber: #fcb900;--wp--preset--color--light-green-cyan: #7bdcb5;--wp--preset--color--vivid-green-cyan: #00d084;--wp--preset--color--pale-cyan-blue: #8ed1fc;--wp--preset--color--vivid-cyan-blue: #0693e3;--wp--preset--color--vivid-purple: #9b51e0;--wp--preset--gradient--vivid-cyan-blue-to-vivid-purple: linear-gradient(135deg,rgba(6,147,227,1) 0%,rgb(155,81,224) 100%);--wp--preset--gradient--light-green-cyan-to-vivid-green-cyan: linear-gradient(135deg,rgb(122,220,180) 0%,rgb(0,208,130) 100%);--wp--preset--gradient--luminous-vivid-amber-to-luminous-vivid-orange: linear-gradient(135deg,rgba(252,185,0,1) 0%,rgba(255,105,0,1) 100%);--wp--preset--gradient--luminous-vivid-orange-to-vivid-red: linear-gradient(135deg,rgba(255,105,0,1) 0%,rgb(207,46,46) 100%);--wp--preset--gradient--very-light-gray-to-cyan-bluish-gray: linear-gradient(135deg,rgb(238,238,238) 0%,rgb(169,184,195) 100%);--wp--preset--gradient--cool-to-warm-spectrum: linear-gradient(135deg,rgb(74,234,220) 0%,rgb(151,120,209) 20%,rgb(207,42,186) 40%,rgb(238,44,130) 60%,rgb(251,105,98) 80%,rgb(254,248,76) 100%);--wp--preset--gradient--blush-light-purple: linear-gradient(135deg,rgb(255,206,236) 0%,rgb(152,150,240) 100%);--wp--preset--gradient--blush-bordeaux: linear-gradient(135deg,rgb(254,205,165) 0%,rgb(254,45,45) 50%,rgb(107,0,62) 100%);--wp--preset--gradient--luminous-dusk: linear-gradient(135deg,rgb(255,203,112) 0%,rgb(199,81,192) 50%,rgb(65,88,208) 100%);--wp--preset--gradient--pale-ocean: linear-gradient(135deg,rgb(255,245,203) 0%,rgb(182,227,212) 50%,rgb(51,167,181) 100%);--wp--preset--gradient--electric-grass: linear-gradient(135deg,rgb(202,248,128) 0%,rgb(113,206,126) 100%);--wp--preset--gradient--midnight: linear-gradient(135deg,rgb(2,3,129) 0%,rgb(40,116,252) 100%);--wp--preset--font-size--small: 13px;--wp--preset--font-size--medium: 20px;--wp--preset--font-size--large: 36px;--wp--preset--font-size--x-large: 42px;--wp--preset--spacing--20: 0.44rem;--wp--preset--spacing--30: 0.67rem;--wp--preset--spacing--40: 1rem;--wp--preset--spacing--50: 1.5rem;--wp--preset--spacing--60: 2.25rem;--wp--preset--spacing--70: 3.38rem;--wp--preset--spacing--80: 5.06rem;--wp--preset--shadow--natural: 6px 6px 9px rgba(0, 0, 0, 0.2);--wp--preset--shadow--deep: 12px 12px 50px rgba(0, 0, 0, 0.4);--wp--preset--shadow--sharp: 6px 6px 0px rgba(0, 0, 0, 0.2);--wp--preset--shadow--outlined: 6px 6px 0px -3px rgba(255, 255, 255, 1), 6px 6px rgba(0, 0, 0, 1);--wp--preset--shadow--crisp: 6px 6px 0px rgba(0, 0, 0, 1);}:where(.is-layout-flex){gap: 0.5em;}:where(.is-layout-grid){gap: 0.5em;}body .is-layout-flex{display: flex;}.is-layout-flex{flex-wrap: wrap;align-items: center;}.is-layout-flex > :is(*, div){margin: 0;}body .is-layout-grid{display: grid;}.is-layout-grid > :is(*, div){margin: 0;}:where(.wp-block-columns.is-layout-flex){gap: 2em;}:where(.wp-block-columns.is-layout-grid){gap: 2em;}:where(.wp-block-post-template.is-layout-flex){gap: 1.25em;}:where(.wp-block-post-template.is-layout-grid){gap: 1.25em;}.has-black-color{color: var(--wp--preset--color--black) !important;}.has-cyan-bluish-gray-color{color: var(--wp--preset--color--cyan-bluish-gray) !important;}.has-white-color{color: var(--wp--preset--color--white) !important;}.has-pale-pink-color{color: var(--wp--preset--color--pale-pink) !important;}.has-vivid-red-color{color: var(--wp--preset--color--vivid-red) !important;}.has-luminous-vivid-orange-color{color: var(--wp--preset--color--luminous-vivid-orange) !important;}.has-luminous-vivid-amber-color{color: var(--wp--preset--color--luminous-vivid-amber) !important;}.has-light-green-cyan-color{color: var(--wp--preset--color--light-green-cyan) !important;}.has-vivid-green-cyan-color{color: var(--wp--preset--color--vivid-green-cyan) !important;}.has-pale-cyan-blue-color{color: var(--wp--preset--color--pale-cyan-blue) !important;}.has-vivid-cyan-blue-color{color: var(--wp--preset--color--vivid-cyan-blue) !important;}.has-vivid-purple-color{color: var(--wp--preset--color--vivid-purple) !important;}.has-black-background-color{background-color: var(--wp--preset--color--black) !important;}.has-cyan-bluish-gray-background-color{background-color: var(--wp--preset--color--cyan-bluish-gray) !important;}.has-white-background-color{background-color: var(--wp--preset--color--white) !important;}.has-pale-pink-background-color{background-color: var(--wp--preset--color--pale-pink) !important;}.has-vivid-red-background-color{background-color: var(--wp--preset--color--vivid-red) !important;}.has-luminous-vivid-orange-background-color{background-color: var(--wp--preset--color--luminous-vivid-orange) !important;}.has-luminous-vivid-amber-background-color{background-color: var(--wp--preset--color--luminous-vivid-amber) !important;}.has-light-green-cyan-background-color{background-color: var(--wp--preset--color--light-green-cyan) !important;}.has-vivid-green-cyan-background-color{background-color: var(--wp--preset--color--vivid-green-cyan) !important;}.has-pale-cyan-blue-background-color{background-color: var(--wp--preset--color--pale-cyan-blue) !important;}.has-vivid-cyan-blue-background-color{background-color: var(--wp--preset--color--vivid-cyan-blue) !important;}.has-vivid-purple-background-color{background-color: var(--wp--preset--color--vivid-purple) !important;}.has-black-border-color{border-color: var(--wp--preset--color--black) !important;}.has-cyan-bluish-gray-border-color{border-color: var(--wp--preset--color--cyan-bluish-gray) !important;}.has-white-border-color{border-color: var(--wp--preset--color--white) !important;}.has-pale-pink-border-color{border-color: var(--wp--preset--color--pale-pink) !important;}.has-vivid-red-border-color{border-color: var(--wp--preset--color--vivid-red) !important;}.has-luminous-vivid-orange-border-color{border-color: var(--wp--preset--color--luminous-vivid-orange) !important;}.has-luminous-vivid-amber-border-color{border-color: var(--wp--preset--color--luminous-vivid-amber) !important;}.has-light-green-cyan-border-color{border-color: var(--wp--preset--color--light-green-cyan) !important;}.has-vivid-green-cyan-border-color{border-color: var(--wp--preset--color--vivid-green-cyan) !important;}.has-pale-cyan-blue-border-color{border-color: var(--wp--preset--color--pale-cyan-blue) !important;}.has-vivid-cyan-blue-border-color{border-color: var(--wp--preset--color--vivid-cyan-blue) !important;}.has-vivid-purple-border-color{border-color: var(--wp--preset--color--vivid-purple) !important;}.has-vivid-cyan-blue-to-vivid-purple-gradient-background{background: var(--wp--preset--gradient--vivid-cyan-blue-to-vivid-purple) !important;}.has-light-green-cyan-to-vivid-green-cyan-gradient-background{background: var(--wp--preset--gradient--light-green-cyan-to-vivid-green-cyan) !important;}.has-luminous-vivid-amber-to-luminous-vivid-orange-gradient-background{background: var(--wp--preset--gradient--luminous-vivid-amber-to-luminous-vivid-orange) !important;}.has-luminous-vivid-orange-to-vivid-red-gradient-background{background: var(--wp--preset--gradient--luminous-vivid-orange-to-vivid-red) !important;}.has-very-light-gray-to-cyan-bluish-gray-gradient-background{background: var(--wp--preset--gradient--very-light-gray-to-cyan-bluish-gray) !important;}.has-cool-to-warm-spectrum-gradient-background{background: var(--wp--preset--gradient--cool-to-warm-spectrum) !important;}.has-blush-light-purple-gradient-background{background: var(--wp--preset--gradient--blush-light-purple) !important;}.has-blush-bordeaux-gradient-background{background: var(--wp--preset--gradient--blush-bordeaux) !important;}.has-luminous-dusk-gradient-background{background: var(--wp--preset--gradient--luminous-dusk) !important;}.has-pale-ocean-gradient-background{background: var(--wp--preset--gradient--pale-ocean) !important;}.has-electric-grass-gradient-background{background: var(--wp--preset--gradient--electric-grass) !important;}.has-midnight-gradient-background{background: var(--wp--preset--gradient--midnight) !important;}.has-small-font-size{font-size: var(--wp--preset--font-size--small) !important;}.has-medium-font-size{font-size: var(--wp--preset--font-size--medium) !important;}.has-large-font-size{font-size: var(--wp--preset--font-size--large) !important;}.has-x-large-font-size{font-size: var(--wp--preset--font-size--x-large) !important;}
:where(.wp-block-post-template.is-layout-flex){gap: 1.25em;}:where(.wp-block-post-template.is-layout-grid){gap: 1.25em;}
:where(.wp-block-columns.is-layout-flex){gap: 2em;}:where(.wp-block-columns.is-layout-grid){gap: 2em;}
:root :where(.wp-block-pullquote){font-size: 1.5em;line-height: 1.6;}
</style>
<link rel='stylesheet' id='bootstrap-css' href='https://sanatandharmveda.com/wp-content/themes/religion-twp/css/bootstrap.css?ver=4.0' type='text/css' media='all' />
<link rel='stylesheet' id='logitech-flaticon-css' href='https://sanatandharmveda.com/wp-content/themes/religion-twp/css/flaticon.css?ver=6.6.5' type='text/css' media='all' />
<link rel='stylesheet' id='owl-slider-css' href='https://sanatandharmveda.com/wp-content/themes/religion-twp/css/owl.carousel.min.css?ver=6.6.5' type='text/css' media='all' />
<link rel='stylesheet' id='lightgallery-css' href='https://sanatandharmveda.com/wp-content/themes/religion-twp/css/lightgallery.css?ver=6.6.5' type='text/css' media='all' />
<link rel='stylesheet' id='logitech-style-css' href='https://sanatandharmveda.com/wp-content/themes/religion-twp/style.css?ver=6.6.5' type='text/css' media='all' />
<link rel='stylesheet' id='logitech-preload-css' href='https://sanatandharmveda.com/wp-content/themes/religion-twp/css/royal-preload.css?ver=6.6.5' type='text/css' media='all' />
<script type="text/javascript" src="https://sanatandharmveda.com/wp-includes/js/jquery/jquery.min.js?ver=3.7.1" id="jquery-core-js"></script>
<script type="text/javascript" src="https://sanatandharmveda.com/wp-includes/js/jquery/jquery-migrate.min.js?ver=3.4.1" id="jquery-migrate-js"></script>
<script type="text/javascript" id="logitech_scripts-js-extra">
/* <![CDATA[ */
var logitech_loadmore_params = {"ajaxurl":"https:\/\/sanatandharmveda.com\/wp-admin\/admin-ajax.php"};
/* ]]> */
</script>
<script type="text/javascript" src="https://sanatandharmveda.com/wp-content/themes/religion-twp/js/myloadmore.js?ver=1783630931" id="logitech_scripts-js"></script>
<link rel="https://api.w.org/" href="https://sanatandharmveda.com/wp-json/" /><link rel="alternate" title="JSON" type="application/json" href="https://sanatandharmveda.com/wp-json/wp/v2/posts/55119" /><link rel="EditURI" type="application/rsd+xml" title="RSD" href="https://sanatandharmveda.com/xmlrpc.php?rsd" />
<meta name="generator" content="WordPress 6.6.5" />
<link rel="canonical" href="https://sanatandharmveda.com/the-evolution-of-slot-machines-from-mechanical-reels-to-online-slot-machine/" />
<link rel='shortlink' href='https://sanatandharmveda.com/?p=55119' />
<link rel="alternate" title="oEmbed (JSON)" type="application/json+oembed" href="https://sanatandharmveda.com/wp-json/oembed/1.0/embed?url=https%3A%2F%2Fsanatandharmveda.com%2Fthe-evolution-of-slot-machines-from-mechanical-reels-to-online-slot-machine%2F" />
<link rel="alternate" title="oEmbed (XML)" type="text/xml+oembed" href="https://sanatandharmveda.com/wp-json/oembed/1.0/embed?url=https%3A%2F%2Fsanatandharmveda.com%2Fthe-evolution-of-slot-machines-from-mechanical-reels-to-online-slot-machine%2F&#038;format=xml" />
<link rel="pingback" href="https://sanatandharmveda.com/xmlrpc.php"><style type="text/css">
		  	/****Main Color****/

			/*Background Color*/
			.bg-primary,
			.list-primary li:before,
			.btn-details:hover,
			.owl-carousel .owl-dots button.owl-dot.active span,
			.owl-carousel .owl-dots button.owl-dot:hover span,
			.owl-carousel .owl-nav button.owl-prev:hover,.owl-carousel .owl-nav button.owl-next:hover,
			.octf-btn,
			.octf-btn-dark:hover, .octf-btn-dark:focus,
			.octf-btn-light:hover, .octf-btn-light:focus,
			.octf-btn.octf-btn-border:hover, .octf-btn.octf-btn-border:focus,
			.main-navigation > ul > li:before,
			.post-box .post-cat a,
			.post-box .btn-play:hover i,
			.page-pagination li span, .page-pagination li a:hover,
			.blog-post .share-post a,
			.post-nav > div .thumb-post:before,
			.post-nav .post-prev.not-thumb a:hover .thumb-post:before,
			.post-nav .post-next.not-thumb a:hover .thumb-post:before,
			.widget-area .widget .widget-title:before,
			.widget-area .widget_categories ul li a:before,.widget-area .widget_product_categories ul li a:before,.widget-area .widget_archive ul li a:before,
			.search-form .search-submit,
			.author-widget_social a:hover,
			.bline-yes .icon-box-1:after,
			.bline-yes .icon-box-2 .content-box:after,
			.box-s2.icon-right .icon-main,
			.ot-image-box:hover .link-box,
			.line-progress .progress-bar,
			.ot-pricing-table.is-featured .inner-table .title-table span,
			.ot-pricing-table.is-featured .octf-btn,
			.circle-social .team-social a:hover,
			.ot-accordions .acc-item.current .acc-toggle,
			.ot-testimonials .tphoto:after,
			.ot-message-box .icon-main,
			.ot-minicart .count,
			.ot-heading > span.is_line:before,
			.mc4wp-form-fields .subscribe-inner-form .subscribe-btn-icon:hover,
			#back-to-top,
			.error-404 .page-content form button:hover,
			.woocommerce ul.products li.product .added_to_cart, .woocommerce ul.products li.product .product_type_grouped, .woocommerce-page ul.products li.product .added_to_cart, .woocommerce-page ul.products li.product .product_type_grouped,
			.woocommerce #respond input#submit.alt, .woocommerce a.button.alt,.woocommerce button.button.alt, .woocommerce input.button.alt,.woocommerce #respond input#submit, .woocommerce a.button,.woocommerce input.button, .woocommerce button.button.alt.disabled,
			.woocommerce button.button,
			.woocommerce-mini-cart__buttons a.button.wc-forward,
			.woocommerce-mini-cart__buttons a.button.wc-forward:hover{ background: #ef7008; }
			.post-box .entry-meta .btn-details:hover, 
			.widget .tagcloud a:hover,
			.ot-heading > span.is_highlight,
			.icon-box-1 .icon-main{background: rgba(239,112,8,0.1);}
			.team-3 .team-thumb a:before{background: rgba(239,112,8,0.8);}
			.projects-grid .projects-box .portfolio-info,
			.projects-grid.style-3 .projects-thumbnail .overlay{background: rgba(239,112,8,0.9);}

			/*Background Image*/
			.author-widget_wrapper:before{ background-image: linear-gradient(230deg, #ef7008 -150%, #fff 80%); }

			/*Border Color*/
			.octf-btn.octf-btn-border,
			.post-box .entry-meta .btn-details:hover,
			.post-box .btn-play:hover i,
			.page-pagination li span, .page-pagination li a:hover,
			.blog-post .tagcloud a:hover,
			.widget .tagcloud a:hover,
			.ot-heading > span.is_highlight,
			.ot-image-box:hover .link-box,
			.ot-accordions .acc-item.current .acc-toggle,
			.ot-tabs .tab-link.current, .ot-tabs .tab-link:hover,
			.ot-video-button a:hover span,
			.woocommerce div.product .woocommerce-tabs ul.tabs li a:hover,
			.woocommerce div.product .woocommerce-tabs ul.tabs li.active a{ border-color: #ef7008; }

			/*Border Top Color*/
			.woocommerce-message,
			.woocommerce-info{ border-top-color: #ef7008; }

			/*Color*/
			blockquote:before,
			blockquote cite,
			.text-primary,
			.link-details,
			.link-details:visited,
			.octf-btn.octf-btn-border,
			.octf-btn.octf-btn-border:visited,
			a:hover, a:focus, a:active,
			.main-navigation > ul > li:hover > a,
			.main-navigation ul li li a:hover,.main-navigation ul ul.sub-menu li.current-menu-item > a,.main-navigation ul ul.sub-menu li.current-menu-ancestor > a,
			.main-navigation ul > li.menu-item-has-children:hover > a,
			.main-navigation ul > li.menu-item-has-children:hover > a:after,
			.main-navigation ul > li.menu-item-has-children > a:hover:after,
			.header_mobile .mobile_nav .mobile_mainmenu li li a:hover,.header_mobile .mobile_nav .mobile_mainmenu ul > li > ul > li.current-menu-ancestor > a,
			.header_mobile .mobile_nav .mobile_mainmenu > li > a:hover, .header_mobile .mobile_nav .mobile_mainmenu > li.current-menu-item > a,.header_mobile .mobile_nav .mobile_mainmenu > li.current-menu-ancestor > a,
			.post-box .entry-meta a:hover,
			.post-box .entry-meta .btn-details:hover,
			.post-box .entry-title a:hover,
			.post-box .link-box a:hover,
			.post-box .link-box i,
			.post-box .quote-box i,
			.post-box .quote-box .quote-text span,
			.blog-post .tagcloud a:hover,
			.blog-post .author-bio .author-info .author-socials a:hover,
			.comments-area .comment-item .comment-meta .comment-reply-link,
			.comment-respond .comment-reply-title small a:hover,
			.comment-form .logged-in-as a:hover,
			.widget .tagcloud a:hover,
			.widget-area .widget ul:not(.recent-news) > li a:hover,
			.widget-area .widget_categories ul li a:hover + span.posts-count,.widget-area .widget_product_categories ul li a:hover + span.posts-count,.widget-area .widget_archive ul li a:hover + span.posts-count,
			.ot-heading > span,
			.icon-box .icon-main,
			.icon-box-grid .icon-box .icon-main,
			.icon-box-grid .icon-box .content-box .title-box a:hover,
			.icon-box-grid .icon-box:hover .icon-main,
			.ot-image-box .link-box,
			.ot-counter span,
			.ot-counter-2 i,
			.ot-countdown li.seperator,
			.ot-pricing-table .inner-table h2,
			.project_filters li a:before,
			.project_filters li a .filter-count,
			.project_filters li a.selected, .project_filters li a:hover,
			.ot-team .team-info span,
			.ot-testimonials .t-head span,
			.woocommerce ul.products li.product .price .woocommerce-Price-amount, .woocommerce-page ul.products li.product .price .woocommerce-Price-amount,
			.woocommerce table.shop_table td.product-price, .woocommerce table.shop_table td.product-subtotal,
			.woocommerce-message:before,
			.woocommerce-info:before,
			.woocommerce .woocommerce-Price-amount,
			.woocommerce .site ul.product_list_widget li a:not(.remove):hover,
			.woocommerce .woocommerce-widget-layered-nav-list li a:hover,
			.woocommerce .widget_price_filter .price_slider_amount button.button,
			.woocommerce div.product p.price,.woocommerce div.product span.price{ color: #ef7008; }

			/*Other*/
			.icon-box .icon-main svg,
			.icon-box-grid .icon-box .icon-main svg,
			.ot-counter-2 svg{ fill: #ef7008; }
				</style><style type="text/css">h1, h2, h3, h4, h5, h6,
			blockquote,
			.font-second,
			.link-details,
			.slide-rev-subtitle,
			.octf-btn,
			select,
			.main-navigation ul,
			.page-header,
			.post-box .post-cat a,
			.post-box .entry-meta,
			.post-box .link-box a,
			.post-box .quote-box .quote-text,
			.page-pagination li a, .page-pagination li span,
			.blog-post .tagcloud a,
			.drop-cap,
			.post-nav,
			.comments-area .comment-item .comment-meta .comment-time,
			.comments-area .comment-item .comment-meta .comment-reply-link,
			.comment-form .logged-in-as,
			.widget .tagcloud a,
			.widget table,
			.widget .recent-news .post-on,
			.ot-heading,
			.ot-flip-box .number-title span,
			.ot-counter,
			.ot-counter span,
			.ot-countdown li span,
			.line-progress .percent,
			.project_filters li a,
			.projects-grid .projects-box .portfolio-info .portfolio-cates,
			.project-slider .projects-box .portfolio-info .portfolio-cates,
			.ot-team .team-info span,
			.member-info li span,
			.ot-accordions .acc-item .acc-toggle,
			.ot-tabs .tab-link,
			.ot-testimonials .t-head,
			.features-service-wrapper .features-service-item .features-service-content,
			div.elementor-widget-heading.elementor-widget-heading .elementor-heading-title,
			.elementor-element .elementor-widget-button .elementor-button,
			.elementor-default .elementor-widget-text-editor .elementor-drop-cap,
			.elementor-widget-wp-widget-polylang .lang-item,
			#lang_choice_wp-widget-polylang,
			.mmenu-wrapper .mobile_mainmenu,
			.woocommerce ul.products li.product, .woocommerce-page ul.products li.product,
			.woocommerce ul.products li.product .added_to_cart, .woocommerce ul.products li.product .product_type_grouped, .woocommerce-page ul.products li.product .added_to_cart, .woocommerce-page ul.products li.product .product_type_grouped,
			.woocommerce table.shop_table,
			.woocommerce .quantity .qty,
			.cart_totals h2,
			#add_payment_method .cart-collaterals .cart_totals table td, #add_payment_method .cart-collaterals .cart_totals table th,.woocommerce-cart .cart-collaterals .cart_totals table td, .woocommerce-cart .cart-collaterals .cart_totals table th,.woocommerce-checkout .cart-collaterals .cart_totals table td, .woocommerce-checkout .cart-collaterals .cart_totals table th,
			.woocommerce .site ul.product_list_widget li a:not(.remove),
			.woocommerce .widget_shopping_cart .cart_list .quantity,
			.woocommerce .widget_shopping_cart .total strong,.woocommerce.widget_shopping_cart .total strong,
			.woocommerce .widget_shopping_cart .total .woocommerce-Price-amount,.woocommerce.widget_shopping_cart .total .woocommerce-Price-amount,
			.woocommerce-mini-cart__buttons a.button.wc-forward,
			.woocommerce .woocommerce-widget-layered-nav-list,
			.woocommerce .widget_price_filter .price_slider_amount,
			.woocommerce .widget_price_filter .price_slider_amount button.button,
			.product_meta > span,
			.woocommerce div.product .entry-summary p.price,.woocommerce div.product .entry-summary span.price{ font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Oxygen-Sans, Ubuntu, Cantarell, "Helvetica Neue", sans-serif;}
		    </style><link rel="icon" href="https://sanatandharmveda.com/wp-content/uploads/2024/05/cropped-cropped-pexels-himeshmehtaa25-3519190-32x32.jpg" sizes="32x32" />
<link rel="icon" href="https://sanatandharmveda.com/wp-content/uploads/2024/05/cropped-cropped-pexels-himeshmehtaa25-3519190-192x192.jpg" sizes="192x192" />
<link rel="apple-touch-icon" href="https://sanatandharmveda.com/wp-content/uploads/2024/05/cropped-cropped-pexels-himeshmehtaa25-3519190-180x180.jpg" />
<meta name="msapplication-TileImage" content="https://sanatandharmveda.com/wp-content/uploads/2024/05/cropped-cropped-pexels-himeshmehtaa25-3519190-270x270.jpg" />
</head>

<body class="post-template-default single single-post postid-55119 single-format-standard wp-custom-logo royal_preloader logitech-theme-ver-5.0 wordpress-version-6.6.5 footer-fixed">
<div id="royal_preloader" data-width="101" data-height="101" data-url="https://sanatandharmveda.com/wp-content/uploads/2024/10/cropped-Sanathana-Dharma-Veda-Main-1.png" data-color="#0a0f2b" data-bgcolor="#fff"></div><div id="page" class="site">
	
	<amp-auto-ads type="adsense"
        data-ad-client="ca-pub-7744495812468961">
</amp-auto-ads>

<!-- #site-header-open -->
<header id="site-header" class="site-header header-transparent">

    <!-- #header-desktop-open -->
    <div class="header-desktop"></div>    <!-- #header-desktop-close -->

    <!-- #header-mobile-open -->
    <div class="header-mobile"></div>    <!-- #header-mobile-close -->

</header>
<!-- #site-header-close -->
<!-- #side-panel-open -->
<!-- #side-panel-close --><!-- #site-content-open -->
<div id="content" class="site-content">
	        
            <div class="page-header flex-middle" >
                <div class="container">
                    <div class="inner flex-middle">
                                                    <h1 class="page-title">The Evolution of Slot Machines: From Mechanical Reels to Online Slot Machine</h1>
                        <ul id="breadcrumbs" class="breadcrumbs none-style"><li><a href="https://sanatandharmveda.com">Home</a></li><li><a href="https://sanatandharmveda.com/blog/">Blog</a></li><li class="active">The Evolution of Slot Machines: From Mechanical Reels to Online Slot Machine</li></ul>    
                            </div>
                </div>
            </div>
        	<div class="entry-content">
		<div class="container">
			<div class="row">
				<div id="primary" class="content-area col-lg-12 col-md-12 col-sm-12 col-xs-12">
					<main id="main" class="site-main">
						
					
 

<article id="post-55119" class="blog-post post-box post-55119 post type-post status-publish format-standard hentry category-blog">
    
    <div class="inner-post no-ptop">
        <div class="post-cat"><div class="posted-in"><a href="https://sanatandharmveda.com/category/blog/" rel="category tag">Blog</a></div></div>        <div class="entry-header">
            <div class="entry-meta">
                            </div>
            
        </div>

        <div class="entry-summary">

            <p>One-armed bandit have come a lengthy way because their modest starts in the late 19th century. What began as a basic mechanical device with a solitary payline has now progressed into a complicated and immersive electronic experience. In this write-up, we will discover the history and evolution of one-armed bandit, from their development to the contemporary<span id="more-55119"></span> online ports that can be delighted in from the comfort of your very own home.</p>
<h2>The Birth of the Slot Machine</h2>
<p>In 1891, a New York-based company called Sittman and Pitt created the first gaming device, which can be taken into consideration the forerunner to the modern-day fruit machine. This machine included five mechanical drums with playing card signs on them. To play, gamers would certainly put a nickel and pull a bar to set the drums moving. The objective was to create a casino poker hand, with benefits varying from complimentary drinks to stogies relying on the facility.</p>
<p>However, it wasn&#8217;t until 1895 that a San Francisco auto mechanic called Charles Fey created the very first real slots as we know it today. Fey&#8217;s equipment, called the Liberty Bell, featured three rotating reels with 5 signs: horseshoes, rubies, spades, hearts, and the Liberty Bell itself. The Freedom Bell became exceptionally popular and led the way for the future of one-armed bandit.</p>
<p><strong>The Liberty Bell marked the beginning of the era of mechanical reel-based one-armed bandit.</strong></p>
<ul>
<li><strong>The Freedom Bell changed the gambling sector by presenting an automated payout system.</strong></li>
<li><strong>The use of mechanical reels made the outcomes of the game more arbitrary.</strong></li>
<li><strong>It promoted making use of fruit icons, which are still typically utilized in one-armed bandit today.</strong></li>
</ul>
<h2>The Increase of Electromechanical Port Machines</h2>
<p>Throughout the early 20th century, fruit machine remained to advance. In the 1960s, the innovation of the initial electromechanical slots paved the way for advanced gameplay functions. These equipments changed the typical mechanical reels with a video clip display and made use of an arbitrary number generator <a href="https://malta-casinon.se/">Malta casinon hotell</a> (RNG) to figure out the results.</p>
<p><strong>Electromechanical one-armed bandit brought numerous essential advancements:</strong></p>
<ul>
<li><strong>Numerous paylines:</strong> Rather than a solitary payline, gamers could now bet on numerous lines, boosting their opportunities of winning.</li>
<li><strong>Perk functions:</strong> Electromechanical machines introduced bonus functions, such as free spins and mini-games, which added an extra layer of exhilaration to the gameplay.</li>
<li><strong>Enhanced security:</strong> The intro of digital components made it harder for players to cheat the system.</li>
</ul>
<p>These innovations made slots a lot more preferred and established the phase for the electronic transformation that was to find.</p>
<h2>The Digital Change: Online Slot Machine</h2>
<p>The advent of the web in the late 20th century caused a new era for fruit machine. Online casino sites began to arise, supplying players the chance to appreciate their favorite port games from the comfort of their own homes. This noted the birth of online ports, which have actually considering that become one of one of the most prominent types of online gambling.</p>
<p>On the internet slots have taken the core concepts of typical one-armed bandit and transformed them into a digital format. They supply a large range of themes, distinct gameplay features, and stunning graphics and animations. Making use of arbitrary number generators guarantees fair game, and online gambling establishments give a safe and secure and convenient system for players to appreciate their favorite video games.</p>
<h2>The Future of Port Machines</h2>
<p>The future of fruit machine looks appealing, with technology continually progressing and offering brand-new possibilities for advancement. Virtual reality (VIRTUAL REALITY) and augmented fact (AR) modern technologies are already being integrated into port video games, supplying gamers a much more immersive and interactive experience.</p>
<ul>
<li><strong>Online fact:</strong> virtual reality innovation permits players to enter virtual globes and communicate with slots in a practical and immersive means.</li>
<li><strong>Augmented truth:</strong> AR innovation superimposes <a href="https://giropaycasino.org/">Giropay Casino hızlı ödeme</a> digital aspects onto the real life, producing an one-of-a-kind mix of electronic and physical gameplay.</li>
<li><strong>Mobile gaming:</strong> With the increase of smartphones and tablet computers, mobile pc gaming has actually become significantly preferred. Slot machine programmers are optimizing their games for smart phones, allowing players to enjoy their favorite slots on the go.</li>
</ul>
<h3>In conclusion</h3>
<p>Vending machine have come a long way given that their beginning in the late 19th century. From mechanical reels to on-line slots, the evolution of this popular game of chance has been driven by technical developments and altering customer choices. Whether you choose the traditional charm of mechanical fruit machine or the convenience of on the internet ports, the world of slot pc gaming remains to provide endless home entertainment.</p>

        </div>
        <div class="entry-footer clearfix">
            <div class="share-post"><a class="twit" target="_blank" href="https://twitter.com/intent/tweet?text=The Evolution of Slot Machines: From Mechanical Reels to Online Slot Machine&url=https://sanatandharmveda.com/the-evolution-of-slot-machines-from-mechanical-reels-to-online-slot-machine/" title="Twitter"><i class="fab fa-twitter"></i></a><a class="face" target="_blank" href="https://www.facebook.com/sharer/sharer.php?u=https://sanatandharmveda.com/the-evolution-of-slot-machines-from-mechanical-reels-to-online-slot-machine/" title="Facebook"><i class="fab fa-facebook-f"></i></a><a class="pint" target="_blank" href="https://www.pinterest.com/pin/create/button/?url=https://sanatandharmveda.com/the-evolution-of-slot-machines-from-mechanical-reels-to-online-slot-machine/&description=The Evolution of Slot Machines: From Mechanical Reels to Online Slot Machine" title="Pinterest"><i class="fab fa-pinterest-p"></i></a><a class="linked" target="_blank" href="https://www.linkedin.com/shareArticle?mini=true&url=https://sanatandharmveda.com/the-evolution-of-slot-machines-from-mechanical-reels-to-online-slot-machine/&title=The Evolution of Slot Machines: From Mechanical Reels to Online Slot Machine&summary=https://sanatandharmveda.com&source=Sanathan Dharm Veda" title="LinkedIn"><i class="fab fa-linkedin-in"></i></a> <a class="google" target="_blank" href="https://plus.google.com/share?url=https://sanatandharmveda.com/the-evolution-of-slot-machines-from-mechanical-reels-to-online-slot-machine/" title="Google Plus"><i class="fab fa-google-plus-g"></i></a> <a class="tumblr" target="_blank" href="http://www.tumblr.com/share/link?url=https://sanatandharmveda.com/the-evolution-of-slot-machines-from-mechanical-reels-to-online-slot-machine/&name=The Evolution of Slot Machines: From Mechanical Reels to Online Slot Machine&description=One-armed bandit have come a lengthy way because their modest starts in the late 19th century. What began as a basic mechanical device with a solitary payline has now progressed into a complicated and immersive electronic experience. In this write-up, we will discover the history and evolution of one-armed bandit, from their development to the [&hellip;]" title="Tumblr"><i class="fab fa-tumblr"></i></a><a class="reddit" href="http://reddit.com/submit?url=https://sanatandharmveda.com/the-evolution-of-slot-machines-from-mechanical-reels-to-online-slot-machine/&title=The Evolution of Slot Machines: From Mechanical Reels to Online Slot Machine" target="_blank" title="Reddit"><i class="fab fa-reddit-alien" aria-hidden="true"></i></a><a class="vk" href="http://vk.com/share.php?url=https://sanatandharmveda.com/the-evolution-of-slot-machines-from-mechanical-reels-to-online-slot-machine/" target="_blank" title="VK"><i class="fab fa-vk"></i></a></div>        </div>
                <div class="post-nav clearfix"><div class="post-prev not-thumb"><a href="https://sanatandharmveda.com/casino-tillsammans-svensk-licens-2026-lagliga-casinon-spellicens/" rel="prev"><div class="thumb-post"></div><div class="info-post"><h6>Casino tillsammans svensk licens 2026 Lagliga casinon ?? spellicens</h6><span>July 10, 2026</span></div></a></div><div class="post-next not-thumb"><a href="https://sanatandharmveda.com/sverige-vill-jordbi-mo-luckorna-samtliga-sajter-inte-me-svensk-person-koncession-jagas/" rel="next"><div class="thumb-post"></div><div class="info-post"><h6>Sverige vill jordbi mo luckorna samtliga sajter inte me svensk person koncession jagas</h6><span>July 10, 2026</span></div></a></div></div>        <div class="related-posts"><h4>Related Posts</h4><div class="row">    
    <div class="col-sm-6">
        <div class="post-box post-item">
            <div class="post-inner">
                                <div class="inner-post">
                    <div class="post-cat"><div class="posted-in"><a href="https://sanatandharmveda.com/category/blog/" rel="category tag">Blog</a></div></div>                    <div class="entry-header">
                        <h5 class="entry-title"><a class="title-link" href="https://sanatandharmveda.com/geduldige-tipps-und-chicken-road-erfahrungen-fur-sicheres-huhner/" rel="bookmark">Geduldige_Tipps_und_chicken_road_erfahrungen_für_sicheres_Hühner-Gameplay_biet</a></h5>                    </div>
                </div>
                <div class="entry-meta">
                                        <a href="https://sanatandharmveda.com/geduldige-tipps-und-chicken-road-erfahrungen-fur-sicheres-huhner/" class="btn-details"><i class="ot-flaticon-trajectory"></i></a>
                </div>
            </div>
        </div>
    </div>

        
    <div class="col-sm-6">
        <div class="post-box post-item">
            <div class="post-inner">
                                <div class="inner-post">
                    <div class="post-cat"><div class="posted-in"><a href="https://sanatandharmveda.com/category/blog/" rel="category tag">Blog</a></div></div>                    <div class="entry-header">
                        <h5 class="entry-title"><a class="title-link" href="https://sanatandharmveda.com/ghostbusters-slot-machine-gamble-which-igt-games-100percent-free/" rel="bookmark">Ghostbusters Slot machine Gamble Which IGT Games 100percent free</a></h5>                    </div>
                </div>
                <div class="entry-meta">
                                        <a href="https://sanatandharmveda.com/ghostbusters-slot-machine-gamble-which-igt-games-100percent-free/" class="btn-details"><i class="ot-flaticon-trajectory"></i></a>
                </div>
            </div>
        </div>
    </div>

    </div></div>    </div>

</article>

					</main><!-- #main -->
				</div><!-- #primary -->
				
							</div>
		</div>	
	</div>

	</div><!-- #content -->
	<footer id="site-footer" class="site-footer" itemscope="itemscope" itemtype="http://schema.org/WPFooter"></footer></div><!-- #page -->
<script type="text/javascript" src="https://sanatandharmveda.com/wp-content/themes/religion-twp/js/royal_preloader.min.js?ver=20200716" id="royal-preloader-js"></script>
<script type="text/javascript" src="https://sanatandharmveda.com/wp-includes/js/imagesloaded.min.js?ver=5.0.0" id="imagesloaded-js"></script>
<script type="text/javascript" src="https://sanatandharmveda.com/wp-content/themes/religion-twp/js/jquery.isotope.min.js?ver=20200716" id="isotope-js"></script>
<script type="text/javascript" src="https://sanatandharmveda.com/wp-content/themes/religion-twp/js/lightgallery-all.min.js?ver=20200716" id="lightgallery-js"></script>
<script type="text/javascript" src="https://sanatandharmveda.com/wp-content/themes/religion-twp/js/owl.carousel.min.js?ver=20200716" id="owl-slider-js"></script>
<script type="text/javascript" src="https://sanatandharmveda.com/wp-content/themes/religion-twp/js/easypiechart.min.js?ver=20200716" id="easypiechart-js"></script>
<script type="text/javascript" src="https://sanatandharmveda.com/wp-content/themes/religion-twp/js/jquery.countdown.min.js?ver=20180910" id="countdown-js"></script>
<script type="text/javascript" src="https://sanatandharmveda.com/wp-content/themes/religion-twp/js/elementor.js?ver=20200716" id="logitech-elementor-js"></script>
<script type="text/javascript" src="https://sanatandharmveda.com/wp-content/themes/religion-twp/js/elementor-header.js?ver=20200716" id="logitech-elementor-header-js"></script>
<script type="text/javascript" src="https://sanatandharmveda.com/wp-content/themes/religion-twp/js/scripts.js?ver=20200716" id="logitech-scripts-js"></script>

</body>
</html>