<?php
/**
* API for fetching the HTML to embed remote content based on a provided URL
*
* Used internally by the WP_Embed class, but is designed to be generic.
*
* @link https://wordpress.org/support/article/embeds/
* @link http://oembed.com/
*
* @package WordPress
* @subpackage oEmbed
*/
/**
* Core class used to implement oEmbed functionality.
*
* @since 2.9.0
*/
class WP_oEmbed {
/**
* A list of oEmbed providers.
*
* @since 2.9.0
* @var array
*/
public $providers = array();
/**
* A list of an early oEmbed providers.
*
* @since 4.0.0
* @var array
*/
public static $early_providers = array();
/**
* A list of private/protected methods, used for backward compatibility.
*
* @since 4.2.0
* @var array
*/
private $compat_methods = array( '_fetch_with_format', '_parse_json', '_parse_xml', '_parse_xml_body' );
/**
* Constructor.
*
* @since 2.9.0
*/
public function __construct() {
$host = urlencode( home_url() );
$providers = array(
'#https?://((m|www)\.)?youtube\.com/watch.*#i' => array( 'https://www.youtube.com/oembed', true ),
'#https?://((m|www)\.)?youtube\.com/playlist.*#i' => array( 'https://www.youtube.com/oembed', true ),
'#https?://((m|www)\.)?youtube\.com/shorts/*#i' => array( 'https://www.youtube.com/oembed', true ),
'#https?://youtu\.be/.*#i' => array( 'https://www.youtube.com/oembed', true ),
'#https?://(.+\.)?vimeo\.com/.*#i' => array( 'https://vimeo.com/api/oembed.{format}', true ),
'#https?://(www\.)?dailymotion\.com/.*#i' => array( 'https://www.dailymotion.com/services/oembed', true ),
'#https?://dai\.ly/.*#i' => array( 'https://www.dailymotion.com/services/oembed', true ),
'#https?://(www\.)?flickr\.com/.*#i' => array( 'https://www.flickr.com/services/oembed/', true ),
'#https?://flic\.kr/.*#i' => array( 'https://www.flickr.com/services/oembed/', true ),
'#https?://(.+\.)?smugmug\.com/.*#i' => array( 'https://api.smugmug.com/services/oembed/', true ),
'#https?://(www\.)?scribd\.com/(doc|document)/.*#i' => array( 'https://www.scribd.com/services/oembed', true ),
'#https?://wordpress\.tv/.*#i' => array( 'https://wordpress.tv/oembed/', true ),
'#https?://(.+\.)?polldaddy\.com/.*#i' => array( 'https://api.crowdsignal.com/oembed', true ),
'#https?://poll\.fm/.*#i' => array( 'https://api.crowdsignal.com/oembed', true ),
'#https?://(.+\.)?survey\.fm/.*#i' => array( 'https://api.crowdsignal.com/oembed', true ),
'#https?://(www\.)?twitter\.com/\w{1,15}/status(es)?/.*#i' => array( 'https://publish.twitter.com/oembed', true ),
'#https?://(www\.)?twitter\.com/\w{1,15}$#i' => array( 'https://publish.twitter.com/oembed', true ),
'#https?://(www\.)?twitter\.com/\w{1,15}/likes$#i' => array( 'https://publish.twitter.com/oembed', true ),
'#https?://(www\.)?twitter\.com/\w{1,15}/lists/.*#i' => array( 'https://publish.twitter.com/oembed', true ),
'#https?://(www\.)?twitter\.com/\w{1,15}/timelines/.*#i' => array( 'https://publish.twitter.com/oembed', true ),
'#https?://(www\.)?twitter\.com/i/moments/.*#i' => array( 'https://publish.twitter.com/oembed', true ),
'#https?://(www\.)?soundcloud\.com/.*#i' => array( 'https://soundcloud.com/oembed', true ),
'#https?://(.+?\.)?slideshare\.net/.*#i' => array( 'https://www.slideshare.net/api/oembed/2', true ),
'#https?://(open|play)\.spotify\.com/.*#i' => array( 'https://embed.spotify.com/oembed/', true ),
'#https?://(.+\.)?imgur\.com/.*#i' => array( 'https://api.imgur.com/oembed', true ),
'#https?://(www\.)?meetu(\.ps|p\.com)/.*#i' => array( 'https://api.meetup.com/oembed', true ),
'#https?://(www\.)?issuu\.com/.+/docs/.+#i' => array( 'https://issuu.com/oembed_wp', true ),
'#https?://(www\.)?mixcloud\.com/.*#i' => array( 'https://www.mixcloud.com/oembed', true ),
'#https?://(www\.|embed\.)?ted\.com/talks/.*#i' => array( 'https://www.ted.com/services/v1/oembed.{format}', true ),
'#https?://(www\.)?(animoto|video214)\.com/play/.*#i' => array( 'https://animoto.com/oembeds/create', true ),
'#https?://(.+)\.tumblr\.com/post/.*#i' => array( 'https://www.tumblr.com/oembed/1.0', true ),
'#https?://(www\.)?kickstarter\.com/projects/.*#i' => array( 'https://www.kickstarter.com/services/oembed', true ),
'#https?://kck\.st/.*#i' => array( 'https://www.kickstarter.com/services/oembed', true ),
'#https?://cloudup\.com/.*#i' => array( 'https://cloudup.com/oembed', true ),
'#https?://(www\.)?reverbnation\.com/.*#i' => array( 'https://www.reverbnation.com/oembed', true ),
'#https?://videopress\.com/v/.*#' => array( 'https://public-api.wordpress.com/oembed/?for=' . $host, true ),
'#https?://(www\.)?reddit\.com/r/[^/]+/comments/.*#i' => array( 'https://www.reddit.com/oembed', true ),
'#https?://(www\.)?speakerdeck\.com/.*#i' => array( 'https://speakerdeck.com/oembed.{format}', true ),
'#https?://(www\.)?screencast\.com/.*#i' => array( 'https://api.screencast.com/external/oembed', true ),
'#https?://([a-z0-9-]+\.)?amazon\.(com|com\.mx|com\.br|ca)/.*#i' => array( 'https://read.amazon.com/kp/api/oembed', true ),
'#https?://([a-z0-9-]+\.)?amazon\.(co\.uk|de|fr|it|es|in|nl|ru)/.*#i' => array( 'https://read.amazon.co.uk/kp/api/oembed', true ),
'#https?://([a-z0-9-]+\.)?amazon\.(co\.jp|com\.au)/.*#i' => array( 'https://read.amazon.com.au/kp/api/oembed', true ),
'#https?://([a-z0-9-]+\.)?amazon\.cn/.*#i' => array( 'https://read.amazon.cn/kp/api/oembed', true ),
'#https?://(www\.)?a\.co/.*#i' => array( 'https://read.amazon.com/kp/api/oembed', true ),
'#https?://(www\.)?amzn\.to/.*#i' => array( 'https://read.amazon.com/kp/api/oembed', true ),
'#https?://(www\.)?amzn\.eu/.*#i' => array( 'https://read.amazon.co.uk/kp/api/oembed', true ),
'#https?://(www\.)?amzn\.in/.*#i' => array( 'https://read.amazon.in/kp/api/oembed', true ),
'#https?://(www\.)?amzn\.asia/.*#i' => array( 'https://read.amazon.com.au/kp/api/oembed', true ),
'#https?://(www\.)?z\.cn/.*#i' => array( 'https://read.amazon.cn/kp/api/oembed', true ),
'#https?://www\.someecards\.com/.+-cards/.+#i' => array( 'https://www.someecards.com/v2/oembed/', true ),
'#https?://www\.someecards\.com/usercards/viewcard/.+#i' => array( 'https://www.someecards.com/v2/oembed/', true ),
'#https?://some\.ly\/.+#i' => array( 'https://www.someecards.com/v2/oembed/', true ),
'#https?://(www\.)?tiktok\.com/.*/video/.*#i' => array( 'https://www.tiktok.com/oembed', true ),
'#https?://([a-z]{2}|www)\.pinterest\.com(\.(au|mx))?/.*#i' => array( 'https://www.pinterest.com/oembed.json', true ),
'#https?://(www\.)?wolframcloud\.com/obj/.+#i' => array( 'https://www.wolframcloud.com/oembed', true ),
);
if ( ! empty( self::$early_providers['add'] ) ) {
foreach ( self::$early_providers['add'] as $format => $data ) {
$providers[ $format ] = $data;
}
}
if ( ! empty( self::$early_providers['remove'] ) ) {
foreach ( self::$early_providers['remove'] as $format ) {
unset( $providers[ $format ] );
}
}
self::$early_providers = array();
/**
* Filters the list of sanctioned oEmbed providers.
*
* Since WordPress 4.4, oEmbed discovery is enabled for all users and allows embedding of sanitized
* iframes. The providers in this list are sanctioned, meaning they are trusted and allowed to
* embed any content, such as iframes, videos, JavaScript, and arbitrary HTML.
*
* Supported providers:
*
* | Provider | Flavor | Since |
* | ------------ | ----------------------------------------- | ------- |
* | Dailymotion | dailymotion.com | 2.9.0 |
* | Flickr | flickr.com | 2.9.0 |
* | Scribd | scribd.com | 2.9.0 |
* | Vimeo | vimeo.com | 2.9.0 |
* | WordPress.tv | wordpress.tv | 2.9.0 |
* | YouTube | youtube.com/watch | 2.9.0 |
* | Crowdsignal | polldaddy.com | 3.0.0 |
* | SmugMug | smugmug.com | 3.0.0 |
* | YouTube | youtu.be | 3.0.0 |
* | Twitter | twitter.com | 3.4.0 |
* | Slideshare | slideshare.net | 3.5.0 |
* | SoundCloud | soundcloud.com | 3.5.0 |
* | Dailymotion | dai.ly | 3.6.0 |
* | Flickr | flic.kr | 3.6.0 |
* | Spotify | spotify.com | 3.6.0 |
* | Imgur | imgur.com | 3.9.0 |
* | Meetup.com | meetup.com | 3.9.0 |
* | Meetup.com | meetu.ps | 3.9.0 |
* | Animoto | animoto.com | 4.0.0 |
* | Animoto | video214.com | 4.0.0 |
* | Issuu | issuu.com | 4.0.0 |
* | Mixcloud | mixcloud.com | 4.0.0 |
* | Crowdsignal | poll.fm | 4.0.0 |
* | TED | ted.com | 4.0.0 |
* | YouTube | youtube.com/playlist | 4.0.0 |
* | Tumblr | tumblr.com | 4.2.0 |
* | Kickstarter | kickstarter.com | 4.2.0 |
* | Kickstarter | kck.st | 4.2.0 |
* | Cloudup | cloudup.com | 4.3.0 |
* | ReverbNation | reverbnation.com | 4.4.0 |
* | VideoPress | videopress.com | 4.4.0 |
* | Reddit | reddit.com | 4.4.0 |
* | Speaker Deck | speakerdeck.com | 4.4.0 |
* | Twitter | twitter.com/timelines | 4.5.0 |
* | Twitter | twitter.com/moments | 4.5.0 |
* | Twitter | twitter.com/user | 4.7.0 |
* | Twitter | twitter.com/likes | 4.7.0 |
* | Twitter | twitter.com/lists | 4.7.0 |
* | Screencast | screencast.com | 4.8.0 |
* | Amazon | amazon.com (com.mx, com.br, ca) | 4.9.0 |
* | Amazon | amazon.de (fr, it, es, in, nl, ru, co.uk) | 4.9.0 |
* | Amazon | amazon.co.jp (com.au) | 4.9.0 |
* | Amazon | amazon.cn | 4.9.0 |
* | Amazon | a.co | 4.9.0 |
* | Amazon | amzn.to (eu, in, asia) | 4.9.0 |
* | Amazon | z.cn | 4.9.0 |
* | Someecards | someecards.com | 4.9.0 |
* | Someecards | some.ly | 4.9.0 |
* | Crowdsignal | survey.fm | 5.1.0 |
* | TikTok | tiktok.com | 5.4.0 |
* | Pinterest | pinterest.com | 5.9.0 |
* | WolframCloud | wolframcloud.com | 5.9.0 |
*
* No longer supported providers:
*
* | Provider | Flavor | Since | Removed |
* | ------------ | -------------------- | --------- | --------- |
* | Qik | qik.com | 2.9.0 | 3.9.0 |
* | Viddler | viddler.com | 2.9.0 | 4.0.0 |
* | Revision3 | revision3.com | 2.9.0 | 4.2.0 |
* | Blip | blip.tv | 2.9.0 | 4.4.0 |
* | Rdio | rdio.com | 3.6.0 | 4.4.1 |
* | Rdio | rd.io | 3.6.0 | 4.4.1 |
* | Vine | vine.co | 4.1.0 | 4.9.0 |
* | Photobucket | photobucket.com | 2.9.0 | 5.1.0 |
* | Funny or Die | funnyordie.com | 3.0.0 | 5.1.0 |
* | CollegeHumor | collegehumor.com | 4.0.0 | 5.3.1 |
* | Hulu | hulu.com | 2.9.0 | 5.5.0 |
* | Instagram | instagram.com | 3.5.0 | 5.5.2 |
* | Instagram | instagr.am | 3.5.0 | 5.5.2 |
* | Instagram TV | instagram.com | 5.1.0 | 5.5.2 |
* | Instagram TV | instagr.am | 5.1.0 | 5.5.2 |
* | Facebook | facebook.com | 4.7.0 | 5.5.2 |
*
* @see wp_oembed_add_provider()
*
* @since 2.9.0
*
* @param array[] $providers An array of arrays containing data about popular oEmbed providers.
*/
$this->providers = apply_filters( 'oembed_providers', $providers );
// Fix any embeds that contain new lines in the middle of the HTML which breaks wpautop().
add_filter( 'oembed_dataparse', array( $this, '_strip_newlines' ), 10, 3 );
}
/**
* Exposes private/protected methods for backward compatibility.
*
* @since 4.0.0
*
* @param string $name Method to call.
* @param array $arguments Arguments to pass when calling.
* @return mixed|false Return value of the callback, false otherwise.
*/
public function __call( $name, $arguments ) {
if ( in_array( $name, $this->compat_methods, true ) ) {
return $this->$name( ...$arguments );
}
return false;
}
/**
* Takes a URL and returns the corresponding oEmbed provider's URL, if there is one.
*
* @since 4.0.0
*
* @see WP_oEmbed::discover()
*
* @param string $url The URL to the content.
* @param string|array $args {
* Optional. Additional provider arguments. Default empty.
*
* @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 oEmbed provider URL on success, false on failure.
*/
public function get_provider( $url, $args = '' ) {
$args = wp_parse_args( $args );
$provider = false;
if ( ! isset( $args['discover'] ) ) {
$args['discover'] = true;
}
foreach ( $this->providers as $matchmask => $data ) {
list( $providerurl, $regex ) = $data;
// Turn the asterisk-type provider URLs into regex.
if ( ! $regex ) {
$matchmask = '#' . str_replace( '___wildcard___', '(.+)', preg_quote( str_replace( '*', '___wildcard___', $matchmask ), '#' ) ) . '#i';
$matchmask = preg_replace( '|^#http\\\://|', '#https?\://', $matchmask );
}
if ( preg_match( $matchmask, $url ) ) {
$provider = str_replace( '{format}', 'json', $providerurl ); // JSON is easier to deal with than XML.
break;
}
}
if ( ! $provider && $args['discover'] ) {
$provider = $this->discover( $url );
}
return $provider;
}
/**
* Adds an oEmbed provider.
*
* The provider is added just-in-time when wp_oembed_add_provider() is called before
* the {@see 'plugins_loaded'} hook.
*
* The just-in-time addition is for the benefit of the {@see 'oembed_providers'} filter.
*
* @since 4.0.0
*
* @see wp_oembed_add_provider()
*
* @param string $format 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.
*/
public static function _add_provider_early( $format, $provider, $regex = false ) {
if ( empty( self::$early_providers['add'] ) ) {
self::$early_providers['add'] = array();
}
self::$early_providers['add'][ $format ] = array( $provider, $regex );
}
/**
* Removes an oEmbed provider.
*
* The provider is removed just-in-time when wp_oembed_remove_provider() is called before
* the {@see 'plugins_loaded'} hook.
*
* The just-in-time removal is for the benefit of the {@see 'oembed_providers'} filter.
*
* @since 4.0.0
*
* @see wp_oembed_remove_provider()
*
* @param string $format The format of URL that this provider can handle. You can use
* asterisks as wildcards.
*/
public static function _remove_provider_early( $format ) {
if ( empty( self::$early_providers['remove'] ) ) {
self::$early_providers['remove'] = array();
}
self::$early_providers['remove'][] = $format;
}
/**
* Takes a URL and attempts to return the oEmbed data.
*
* @see WP_oEmbed::fetch()
*
* @since 4.8.0
*
* @param string $url The URL to the content that should be attempted to be embedded.
* @param string|array $args Optional. Additional arguments for retrieving embed HTML.
* See wp_oembed_get() for accepted arguments. Default empty.
* @return object|false The result in the form of an object on success, false on failure.
*/
public function get_data( $url, $args = '' ) {
$args = wp_parse_args( $args );
$provider = $this->get_provider( $url, $args );
if ( ! $provider ) {
return false;
}
$data = $this->fetch( $provider, $url, $args );
if ( false === $data ) {
return false;
}
return $data;
}
/**
* The do-it-all function that takes a URL and attempts to return the HTML.
*
* @see WP_oEmbed::fetch()
* @see WP_oEmbed::data2html()
*
* @since 2.9.0
*
* @param string $url The URL to the content that should be attempted to be embedded.
* @param string|array $args Optional. Additional arguments for retrieving embed HTML.
* See wp_oembed_get() for accepted arguments. Default empty.
* @return string|false The UNSANITIZED (and potentially unsafe) HTML that should be used to embed
* on success, false on failure.
*/
public function get_html( $url, $args = '' ) {
/**
* Filters the oEmbed result before any HTTP requests are made.
*
* This allows one to short-circuit the default logic, perhaps by
* replacing it with a routine that is more optimal for your setup.
*
* Returning a non-null value from the filter will effectively short-circuit retrieval
* and return the passed value instead.
*
* @since 4.5.3
*
* @param null|string $result The UNSANITIZED (and potentially unsafe) HTML that should be used to embed.
* Default null to continue retrieving the result.
* @param string $url The URL to the content that should be attempted to be embedded.
* @param string|array $args Optional. Additional arguments for retrieving embed HTML.
* See wp_oembed_get() for accepted arguments. Default empty.
*/
$pre = apply_filters( 'pre_oembed_result', null, $url, $args );
if ( null !== $pre ) {
return $pre;
}
$data = $this->get_data( $url, $args );
if ( false === $data ) {
return false;
}
/**
* Filters the HTML returned by the oEmbed provider.
*
* @since 2.9.0
*
* @param string|false $data The returned oEmbed HTML (false if unsafe).
* @param string $url URL of the content to be embedded.
* @param string|array $args Optional. Additional arguments for retrieving embed HTML.
* See wp_oembed_get() for accepted arguments. Default empty.
*/
return apply_filters( 'oembed_result', $this->data2html( $data, $url ), $url, $args );
}
/**
* Attempts to discover link tags at the given URL for an oEmbed provider.
*
* @since 2.9.0
*
* @param string $url The URL that should be inspected for discovery `<link>` tags.
* @return string|false The oEmbed provider URL on success, false on failure.
*/
public function discover( $url ) {
$providers = array();
$args = array(
'limit_response_size' => 153600, // 150 KB
);
/**
* Filters oEmbed remote get arguments.
*
* @since 4.0.0
*
* @see WP_Http::request()
*
* @param array $args oEmbed remote get arguments.
* @param string $url URL to be inspected.
*/
$args = apply_filters( 'oembed_remote_get_args', $args, $url );
// Fetch URL content.
$request = wp_safe_remote_get( $url, $args );
$html = wp_remote_retrieve_body( $request );
if ( $html ) {
/**
* Filters the link types that contain oEmbed provider URLs.
*
* @since 2.9.0
*
* @param string[] $format Array of oEmbed link types. Accepts 'application/json+oembed',
* 'text/xml+oembed', and 'application/xml+oembed' (incorrect,
* used by at least Vimeo).
*/
$linktypes = apply_filters(
'oembed_linktypes',
array(
'application/json+oembed' => 'json',
'text/xml+oembed' => 'xml',
'application/xml+oembed' => 'xml',
)
);
// Strip <body>.
$html_head_end = stripos( $html, '</head>' );
if ( $html_head_end ) {
$html = substr( $html, 0, $html_head_end );
}
// Do a quick check.
$tagfound = false;
foreach ( $linktypes as $linktype => $format ) {
if ( stripos( $html, $linktype ) ) {
$tagfound = true;
break;
}
}
if ( $tagfound && preg_match_all( '#<link([^<>]+)/?>#iU', $html, $links ) ) {
foreach ( $links[1] as $link ) {
$atts = shortcode_parse_atts( $link );
if ( ! empty( $atts['type'] ) && ! empty( $linktypes[ $atts['type'] ] ) && ! empty( $atts['href'] ) ) {
$providers[ $linktypes[ $atts['type'] ] ] = htmlspecialchars_decode( $atts['href'] );
// Stop here if it's JSON (that's all we need).
if ( 'json' === $linktypes[ $atts['type'] ] ) {
break;
}
}
}
}
}
// JSON is preferred to XML.
if ( ! empty( $providers['json'] ) ) {
return $providers['json'];
} elseif ( ! empty( $providers['xml'] ) ) {
return $providers['xml'];
} else {
return false;
}
}
/**
* Connects to a oEmbed provider and returns the result.
*
* @since 2.9.0
*
* @param string $provider The URL to the oEmbed provider.
* @param string $url The URL to the content that is desired to be embedded.
* @param string|array $args Optional. Additional arguments for retrieving embed HTML.
* See wp_oembed_get() for accepted arguments. Default empty.
* @return object|false The result in the form of an object on success, false on failure.
*/
public function fetch( $provider, $url, $args = '' ) {
$args = wp_parse_args( $args, wp_embed_defaults( $url ) );
$provider = add_query_arg( 'maxwidth', (int) $args['width'], $provider );
$provider = add_query_arg( 'maxheight', (int) $args['height'], $provider );
$provider = add_query_arg( 'url', urlencode( $url ), $provider );
$provider = add_query_arg( 'dnt', 1, $provider );
/**
* Filters the oEmbed URL to be fetched.
*
* @since 2.9.0
* @since 4.9.0 The `dnt` (Do Not Track) query parameter was added to all oEmbed provider URLs.
*
* @param string $provider URL of the oEmbed provider.
* @param string $url URL of the content to be embedded.
* @param array $args Optional. Additional arguments for retrieving embed HTML.
* See wp_oembed_get() for accepted arguments. Default empty.
*/
$provider = apply_filters( 'oembed_fetch_url', $provider, $url, $args );
foreach ( array( 'json', 'xml' ) as $format ) {
$result = $this->_fetch_with_format( $provider, $format );
if ( is_wp_error( $result ) && 'not-implemented' === $result->get_error_code() ) {
continue;
}
return ( $result && ! is_wp_error( $result ) ) ? $result : false;
}
return false;
}
/**
* Fetches result from an oEmbed provider for a specific format and complete provider URL
*
* @since 3.0.0
*
* @param string $provider_url_with_args URL to the provider with full arguments list (url, maxheight, etc.)
* @param string $format Format to use.
* @return object|false|WP_Error The result in the form of an object on success, false on failure.
*/
private function _fetch_with_format( $provider_url_with_args, $format ) {
$provider_url_with_args = add_query_arg( 'format', $format, $provider_url_with_args );
/** This filter is documented in wp-includes/class-wp-oembed.php */
$args = apply_filters( 'oembed_remote_get_args', array(), $provider_url_with_args );
$response = wp_safe_remote_get( $provider_url_with_args, $args );
if ( 501 == wp_remote_retrieve_response_code( $response ) ) {
return new WP_Error( 'not-implemented' );
}
$body = wp_remote_retrieve_body( $response );
if ( ! $body ) {
return false;
}
$parse_method = "_parse_$format";
return $this->$parse_method( $body );
}
/**
* Parses a json response body.
*
* @since 3.0.0
*
* @param string $response_body
* @return object|false
*/
private function _parse_json( $response_body ) {
$data = json_decode( trim( $response_body ) );
return ( $data && is_object( $data ) ) ? $data : false;
}
/**
* Parses an XML response body.
*
* @since 3.0.0
*
* @param string $response_body
* @return object|false
*/
private function _parse_xml( $response_body ) {
if ( ! function_exists( 'libxml_disable_entity_loader' ) ) {
return false;
}
if ( PHP_VERSION_ID < 80000 ) {
// This function has been deprecated in PHP 8.0 because in libxml 2.9.0, external entity loading
// is disabled by default, so this function is no longer needed to protect against XXE attacks.
// phpcs:ignore PHPCompatibility.FunctionUse.RemovedFunctions.libxml_disable_entity_loaderDeprecated
$loader = libxml_disable_entity_loader( true );
}
$errors = libxml_use_internal_errors( true );
$return = $this->_parse_xml_body( $response_body );
libxml_use_internal_errors( $errors );
if ( PHP_VERSION_ID < 80000 && isset( $loader ) ) {
// phpcs:ignore PHPCompatibility.FunctionUse.RemovedFunctions.libxml_disable_entity_loaderDeprecated
libxml_disable_entity_loader( $loader );
}
return $return;
}
/**
* Serves as a helper function for parsing an XML response body.
*
* @since 3.6.0
*
* @param string $response_body
* @return stdClass|false
*/
private function _parse_xml_body( $response_body ) {
if ( ! function_exists( 'simplexml_import_dom' ) || ! class_exists( 'DOMDocument', false ) ) {
return false;
}
$dom = new DOMDocument;
$success = $dom->loadXML( $response_body );
if ( ! $success ) {
return false;
}
if ( isset( $dom->doctype ) ) {
return false;
}
foreach ( $dom->childNodes as $child ) {
if ( XML_DOCUMENT_TYPE_NODE === $child->nodeType ) {
return false;
}
}
$xml = simplexml_import_dom( $dom );
if ( ! $xml ) {
return false;
}
$return = new stdClass;
foreach ( $xml as $key => $value ) {
$return->$key = (string) $value;
}
return $return;
}
/**
* Converts a data object from WP_oEmbed::fetch() and returns the HTML.
*
* @since 2.9.0
*
* @param object $data A data object result from an oEmbed provider.
* @param string $url The URL to the content that is desired to be embedded.
* @return string|false The HTML needed to embed on success, false on failure.
*/
public function data2html( $data, $url ) {
if ( ! is_object( $data ) || empty( $data->type ) ) {
return false;
}
$return = false;
switch ( $data->type ) {
case 'photo':
if ( empty( $data->url ) || empty( $data->width ) || empty( $data->height ) ) {
break;
}
if ( ! is_string( $data->url ) || ! is_numeric( $data->width ) || ! is_numeric( $data->height ) ) {
break;
}
$title = ! empty( $data->title ) && is_string( $data->title ) ? $data->title : '';
$return = '<a href="' . esc_url( $url ) . '"><img src="' . esc_url( $data->url ) . '" alt="' . esc_attr( $title ) . '" width="' . esc_attr( $data->width ) . '" height="' . esc_attr( $data->height ) . '" /></a>';
break;
case 'video':
case 'rich':
if ( ! empty( $data->html ) && is_string( $data->html ) ) {
$return = $data->html;
}
break;
case 'link':
if ( ! empty( $data->title ) && is_string( $data->title ) ) {
$return = '<a href="' . esc_url( $url ) . '">' . esc_html( $data->title ) . '</a>';
}
break;
default:
$return = false;
}
/**
* Filters the returned oEmbed HTML.
*
* Use this filter to add support for custom data types, or to filter the result.
*
* @since 2.9.0
*
* @param string $return The returned oEmbed HTML.
* @param object $data A data object result from an oEmbed provider.
* @param string $url The URL of the content to be embedded.
*/
return apply_filters( 'oembed_dataparse', $return, $data, $url );
}
/**
* Strips any new lines from the HTML.
*
* @since 2.9.0 as strip_scribd_newlines()
* @since 3.0.0
*
* @param string $html Existing HTML.
* @param object $data Data object from WP_oEmbed::data2html()
* @param string $url The original URL passed to oEmbed.
* @return string Possibly modified $html
*/
public function _strip_newlines( $html, $data, $url ) {
if ( false === strpos( $html, "\n" ) ) {
return $html;
}
$count = 1;
$found = array();
$token = '__PRE__';
$search = array( "\t", "\n", "\r", ' ' );
$replace = array( '__TAB__', '__NL__', '__CR__', '__SPACE__' );
$tokenized = str_replace( $search, $replace, $html );
preg_match_all( '#(<pre[^>]*>.+?</pre>)#i', $tokenized, $matches, PREG_SET_ORDER );
foreach ( $matches as $i => $match ) {
$tag_html = str_replace( $replace, $search, $match[0] );
$tag_token = $token . $i;
$found[ $tag_token ] = $tag_html;
$html = str_replace( $tag_html, $tag_token, $html, $count );
}
$replaced = str_replace( $replace, $search, $html );
$stripped = str_replace( array( "\r\n", "\n" ), '', $replaced );
$pre = array_values( $found );
$tokens = array_keys( $found );
return str_replace( $tokens, $pre, $stripped );
}
}