<?php /** * oEmbed API: Top-level oEmbed functionality * * @package WordPress * @subpackage oEmbed * @since 4.4.0 */ /** * Registers an embed handler. * * Should probably only be used for sites that do not support oEmbed. * * @since 2.9.0 * * @global WP_Embed $wp_embed WordPress Embed object. * * @param string $id An internal ID/name for the handler. Needs to be unique. * @param string $regex The regex that will be used to see if this handler should be used for a URL. * @param callable $callback The callback function that will be called if the regex is matched. * @param int $priority Optional. Used to specify the order in which the registered handlers will * be tested. Default 10. */ function wp_embed_register_handler( $id, $regex, $callback, $priority = 10 ) { global $wp_embed; $wp_embed->register_handler( $id, $regex, $callback, $priority ); } /** * Unregisters a previously-registered embed handler. * * @since 2.9.0 * * @global WP_Embed $wp_embed WordPress Embed object. * * @param string $id The handler ID that should be removed. * @param int $priority Optional. The priority of the handler to be removed. Default 10. */ function wp_embed_unregister_handler( $id, $priority = 10 ) { global $wp_embed; $wp_embed->unregister_handler( $id, $priority ); } /** * Creates default array of embed parameters. * * The width defaults to the content width as specified by the theme. If the * theme does not specify a content width, then 500px is used. * * The default height is 1.5 times the width, or 1000px, whichever is smaller. * * The {@see 'embed_defaults'} filter can be used to adjust either of these values. * * @since 2.9.0 * * @global int $content_width * * @param string $url Optional. The URL that should be embedded. Default empty. * @return int[] { * Indexed array of the embed width and height in pixels. * * @type int $0 The embed width. * @type int $1 The embed height. * } */ function wp_embed_defaults( $url = '' ) { if ( ! empty( $GLOBALS['content_width'] ) ) { $width = (int) $GLOBALS['content_width']; } if ( empty( $width ) ) { $width = 500; } $height = min( (int) ceil( $width * 1.5 ), 1000 ); /** * Filters the default array of embed dimensions. * * @since 2.9.0 * * @param int[] $size { * Indexed array of the embed width and height in pixels. * * @type int $0 The embed width. * @type int $1 The embed height. * } * @param string $url The URL that should be embedded. */ return apply_filters( 'embed_defaults', compact( 'width', 'height' ), $url ); } /** * Attempts to fetch the embed HTML for a provided URL using oEmbed. * * @since 2.9.0 * * @see WP_oEmbed * * @param string $url The URL that should be embedded. * @param array|string $args { * Optional. Additional arguments for retrieving embed HTML. Default empty. * * @type int|string $width Optional. The `maxwidth` value passed to the provider URL. * @type int|string $height Optional. The `maxheight` value passed to the provider URL. * @type bool $discover Optional. Determines whether to attempt to discover link tags * at the given URL for an oEmbed provider when the provider URL * is not found in the built-in providers list. Default true. * } * @return string|false The embed HTML on success, false on failure. */ function wp_oembed_get( $url, $args = '' ) { $oembed = _wp_oembed_get_object(); return $oembed->get_html( $url, $args ); } /** * Returns the initialized WP_oEmbed object. * * @since 2.9.0 * @access private * * @return WP_oEmbed object. */ function _wp_oembed_get_object() { static $wp_oembed = null; if ( is_null( $wp_oembed ) ) { $wp_oembed = new WP_oEmbed(); } return $wp_oembed; } /** * Adds a URL format and oEmbed provider URL pair. * * @since 2.9.0 * * @see WP_oEmbed * * @param string $format The format of URL that this provider can handle. You can use asterisks * as wildcards. * @param string $provider The URL to the oEmbed provider. * @param bool $regex Optional. Whether the `$format` parameter is in a RegEx format. Default false. */ function wp_oembed_add_provider( $format, $provider, $regex = false ) { if ( did_action( 'plugins_loaded' ) ) { $oembed = _wp_oembed_get_object(); $oembed->providers[ $format ] = array( $provider, $regex ); } else { WP_oEmbed::_add_provider_early( $format, $provider, $regex ); } } /** * Removes an oEmbed provider. * * @since 3.5.0 * * @see WP_oEmbed * * @param string $format The URL format for the oEmbed provider to remove. * @return bool Was the provider removed successfully? */ function wp_oembed_remove_provider( $format ) { if ( did_action( 'plugins_loaded' ) ) { $oembed = _wp_oembed_get_object(); if ( isset( $oembed->providers[ $format ] ) ) { unset( $oembed->providers[ $format ] ); return true; } } else { WP_oEmbed::_remove_provider_early( $format ); } return false; } /** * Determines if default embed handlers should be loaded. * * Checks to make sure that the embeds library hasn't already been loaded. If * it hasn't, then it will load the embeds library. * * @since 2.9.0 * * @see wp_embed_register_handler() */ function wp_maybe_load_embeds() { /** * Filters whether to load the default embed handlers. * * Returning a falsey value will prevent loading the default embed handlers. * * @since 2.9.0 * * @param bool $maybe_load_embeds Whether to load the embeds library. Default true. */ if ( ! apply_filters( 'load_default_embeds', true ) ) { return; } wp_embed_register_handler( 'youtube_embed_url', '#https?://(www.)?youtube\.com/(?:v|embed)/([^/]+)#i', 'wp_embed_handler_youtube' ); /** * Filters the audio embed handler callback. * * @since 3.6.0 * * @param callable $handler Audio embed handler callback function. */ wp_embed_register_handler( 'audio', '#^https?://.+?\.(' . implode( '|', wp_get_audio_extensions() ) . ')$#i', apply_filters( 'wp_audio_embed_handler', 'wp_embed_handler_audio' ), 9999 ); /** * Filters the video embed handler callback. * * @since 3.6.0 * * @param callable $handler Video embed handler callback function. */ wp_embed_register_handler( 'video', '#^https?://.+?\.(' . implode( '|', wp_get_video_extensions() ) . ')$#i', apply_filters( 'wp_video_embed_handler', 'wp_embed_handler_video' ), 9999 ); } /** * YouTube iframe embed handler callback. * * Catches YouTube iframe embed URLs that are not parsable by oEmbed but can be translated into a URL that is. * * @since 4.0.0 * * @global WP_Embed $wp_embed WordPress Embed object. * * @param array $matches The RegEx matches from the provided regex when calling * wp_embed_register_handler(). * @param array $attr Embed attributes. * @param string $url The original URL that was matched by the regex. * @param array $rawattr The original unmodified attributes. * @return string The embed HTML. */ function wp_embed_handler_youtube( $matches, $attr, $url, $rawattr ) { global $wp_embed; $embed = $wp_embed->autoembed( sprintf( 'https://youtube.com/watch?v=%s', urlencode( $matches[2] ) ) ); /** * Filters the YouTube embed output. * * @since 4.0.0 * * @see wp_embed_handler_youtube() * * @param string $embed YouTube embed output. * @param array $attr An array of embed attributes. * @param string $url The original URL that was matched by the regex. * @param array $rawattr The original unmodified attributes. */ return apply_filters( 'wp_embed_handler_youtube', $embed, $attr, $url, $rawattr ); } /** * Audio embed handler callback. * * @since 3.6.0 * * @param array $matches The RegEx matches from the provided regex when calling wp_embed_register_handler(). * @param array $attr Embed attributes. * @param string $url The original URL that was matched by the regex. * @param array $rawattr The original unmodified attributes. * @return string The embed HTML.