Upstream/WordPress
1
0
Fork 0
mirror of https://github.com/WordPress/WordPress.git synced 2024-06-28 07:45:02 +02:00
Code Issues Projects Releases Wiki Activity
629b43769b
WordPress/wp-includes/class-oembed.php
Pascal Birchler 629b43769b Embeds: Improve performance when embedding a post from the current site. 
When the post being embedded is from the same site, there's no reason to do an HTTP request for it. The data can be fetched directly using `get_oembed_response_data()`.

Fixes #36767 for trunk.
Built from https://develop.svn.wordpress.org/trunk@37708


git-svn-id: http://core.svn.wordpress.org/trunk@37674 1a063a9b-81f0-0310-95a4-ce76da25c4cd
2016-06-15 11:23:28 +00:00

696 lines
27 KiB
PHP
Raw Blame History

<?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://codex.wordpress.org/oEmbed oEmbed Codex Article
* @link http://oembed.com/ oEmbed Homepage
*
* @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
* @access public
* @var array
*/
public $providers = array();
/**
* A list of an early oEmbed providers.
*
* @since 4.0.0
* @access public
* @static
* @var array
*/
public static $early_providers = array();
/**
* A list of private/protected methods, used for backward compatibility.
*
* @since 4.2.0
* @access private
* @var array
*/
private $compat_methods = array( '_fetch_with_format', '_parse_json', '_parse_xml', '_parse_body' );
/**
* Constructor.
*
* @since 2.9.0
* @access public
*/
public function __construct() {
$host = urlencode( home_url() );
$providers = array(
'#http://((m|www)\.)?youtube\.com/watch.*#i' => array( 'http://www.youtube.com/oembed', true ),
'#https://((m|www)\.)?youtube\.com/watch.*#i' => array( 'http://www.youtube.com/oembed?scheme=https', true ),
'#http://((m|www)\.)?youtube\.com/playlist.*#i' => array( 'http://www.youtube.com/oembed', true ),
'#https://((m|www)\.)?youtube\.com/playlist.*#i' => array( 'http://www.youtube.com/oembed?scheme=https', true ),
'#http://youtu\.be/.*#i' => array( 'http://www.youtube.com/oembed', true ),
'#https://youtu\.be/.*#i' => array( 'http://www.youtube.com/oembed?scheme=https', true ),
'#https?://(.+\.)?vimeo\.com/.*#i' => array( 'http://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( 'http://api.smugmug.com/services/oembed/', true ),
'#https?://(www\.)?hulu\.com/watch/.*#i' => array( 'http://www.hulu.com/api/oembed.{format}', true ),
'http://i*.photobucket.com/albums/*' => array( 'http://api.photobucket.com/oembed', false ),
'http://gi*.photobucket.com/groups/*' => array( 'http://api.photobucket.com/oembed', false ),
'#https?://(www\.)?scribd\.com/doc/.*#i' => array( 'http://www.scribd.com/services/oembed', true ),
'#https?://wordpress.tv/.*#i' => array( 'http://wordpress.tv/oembed/', true ),
'#https?://(.+\.)?polldaddy\.com/.*#i' => array( 'https://polldaddy.com/oembed/', true ),
'#https?://poll\.fm/.*#i' => array( 'https://polldaddy.com/oembed/', true ),
'#https?://(www\.)?funnyordie\.com/videos/.*#i' => array( 'http://www.funnyordie.com/oembed', true ),
'#https?://(www\.)?twitter\.com/.+?/status(es)?/.*#i' => array( 'https://publish.twitter.com/oembed', true ),
'#https?://(www\.)?twitter\.com/.+?/timelines/.*#i' => array( 'https://publish.twitter.com/oembed', true ),
'#https?://(www\.)?twitter\.com/i/moments/.*#i' => array( 'https://publish.twitter.com/oembed', true ),
'#https?://vine.co/v/.*#i' => array( 'https://vine.co/oembed.{format}', true ),
'#https?://(www\.)?soundcloud\.com/.*#i' => array( 'http://soundcloud.com/oembed', true ),
'#https?://(.+?\.)?slideshare\.net/.*#i' => array( 'https://www.slideshare.net/api/oembed/2', true ),
'#https?://(www\.)?instagr(\.am|am\.com)/p/.*#i' => array( 'https://api.instagram.com/oembed', true ),
'#https?://(open|play)\.spotify\.com/.*#i' => array( 'https://embed.spotify.com/oembed/', true ),
'#https?://(.+\.)?imgur\.com/.*#i' => array( 'http://api.imgur.com/oembed', true ),
'#https?://(www\.)?meetu(\.ps|p\.com)/.*#i' => array( 'http://api.meetup.com/oembed', true ),
'#https?://(www\.)?issuu\.com/.+/docs/.+#i' => array( 'http://issuu.com/oembed_wp', true ),
'#https?://(www\.)?collegehumor\.com/video/.*#i' => array( 'http://www.collegehumor.com/oembed.{format}', true ),
'#https?://(www\.)?mixcloud\.com/.*#i' => array( 'http://www.mixcloud.com/oembed', true ),
'#https?://(www\.|embed\.)?ted\.com/talks/.*#i' => array( 'http://www.ted.com/talks/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/1.0/?for=' . $host, true ),
'#https?://(www\.)?reddit\.com/r/[^/]+/comments/.*#i' => array( 'https://www.reddit.com/oembed', true ),
'#https?://(www\.)?speakerdeck\.com/.*#i' => array( 'https://speakerdeck.com/oembed.{format}', true ),
);
if ( ! empty( self::$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 whitelisted 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 whitelisted, meaning they are trusted and allowed to
* embed any content, such as iframes, videos, JavaScript, and arbitrary HTML.
*
* Supported providers:
*
* | Provider | Flavor | Supports HTTPS | Since |
* | ------------ | --------------------- | :------------: | --------- |
* | Dailymotion | dailymotion.com | Yes | 2.9.0 |
* | Flickr | flickr.com | Yes | 2.9.0 |
* | Hulu | hulu.com | Yes | 2.9.0 |
* | Photobucket | photobucket.com | No | 2.9.0 |
* | Scribd | scribd.com | Yes | 2.9.0 |
* | Vimeo | vimeo.com | Yes | 2.9.0 |
* | WordPress.tv | wordpress.tv | Yes | 2.9.0 |
* | YouTube | youtube.com/watch | Yes | 2.9.0 |
* | Funny or Die | funnyordie.com | Yes | 3.0.0 |
* | Polldaddy | polldaddy.com | Yes | 3.0.0 |
* | SmugMug | smugmug.com | Yes | 3.0.0 |
* | YouTube | youtu.be | Yes | 3.0.0 |
* | Twitter | twitter.com | Yes | 3.4.0 |
* | Instagram | instagram.com | Yes | 3.5.0 |
* | Instagram | instagr.am | Yes | 3.5.0 |
* | Slideshare | slideshare.net | Yes | 3.5.0 |
* | SoundCloud | soundcloud.com | Yes | 3.5.0 |
* | Dailymotion | dai.ly | Yes | 3.6.0 |
* | Flickr | flic.kr | Yes | 3.6.0 |
* | Spotify | spotify.com | Yes | 3.6.0 |
* | Imgur | imgur.com | Yes | 3.9.0 |
* | Meetup.com | meetup.com | Yes | 3.9.0 |
* | Meetup.com | meetu.ps | Yes | 3.9.0 |
* | Animoto | animoto.com | Yes | 4.0.0 |
* | Animoto | video214.com | Yes | 4.0.0 |
* | CollegeHumor | collegehumor.com | Yes | 4.0.0 |
* | Issuu | issuu.com | Yes | 4.0.0 |
* | Mixcloud | mixcloud.com | Yes | 4.0.0 |
* | Polldaddy | poll.fm | Yes | 4.0.0 |
* | TED | ted.com | Yes | 4.0.0 |
* | YouTube | youtube.com/playlist | Yes | 4.0.0 |
* | Vine | vine.co | Yes | 4.1.0 |
* | Tumblr | tumblr.com | Yes | 4.2.0 |
* | Kickstarter | kickstarter.com | Yes | 4.2.0 |
* | Kickstarter | kck.st | Yes | 4.2.0 |
* | Cloudup | cloudup.com | Yes | 4.4.0 |
* | ReverbNation | reverbnation.com | Yes | 4.4.0 |
* | VideoPress | videopress.com | Yes | 4.4.0 |
* | Reddit | reddit.com | Yes | 4.4.0 |
* | Speaker Deck | speakerdeck.com | Yes | 4.4.0 |
* | Twitter | twitter.com/timelines | Yes | 4.5.0 |
* | Twitter | twitter.com/moments | Yes | 4.5.0 |
*
* No longer supported providers:
*
* | Provider | Flavor | Supports HTTPS | Since | Removed |
* | ------------ | -------------------- | :------------: | --------- | --------- |
* | Qik | qik.com | Yes | 2.9.0 | 3.9.0 |
* | Viddler | viddler.com | Yes | 2.9.0 | 4.0.0 |
* | Revision3 | revision3.com | No | 2.9.0 | 4.2.0 |
* | Blip | blip.tv | No | 2.9.0 | 4.4.0 |
* | Rdio | rdio.com | Yes | 3.6.0 | 4.4.1 |
* | Rdio | rd.io | Yes | 3.6.0 | 4.4.1 |
*
* @see wp_oembed_add_provider()
*
* @since 2.9.0
*
* @param array $providers An array of 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
* @access public
*
* @param callable $name Method to call.
* @param array $arguments Arguments to pass when calling.
* @return mixed|bool Return value of the callback, false otherwise.
*/
public function __call( $name, $arguments ) {
if ( in_array( $name, $this->compat_methods ) ) {
return call_user_func_array( array( $this, $name ), $arguments );
}
return false;
}
/**
* Takes a URL and returns the corresponding oEmbed provider's URL, if there is one.
*
* @since 4.0.0
* @access public
*
* @see WP_oEmbed::discover()
*
* @param string $url The URL to the content.
* @param string|array $args Optional provider arguments.
* @return false|string False on failure, otherwise the oEmbed provider URL.
*/
public function get_provider( $url, $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 removed 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.
*
* @static
* @since 4.0.0
* @access public
*
* @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
* @access public
* @static
*
* @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;
}
/**
* 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
* @access public
*
* @param string $url The URL to the content that should be attempted to be embedded.
* @param array|string $args Optional. Arguments, usually passed from a shortcode. Default empty.
* @return false|string False on failure, otherwise the UNSANITIZED (and potentially unsafe) HTML that should be used to embed.
*/
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.
*
* Passing a non-null value to the filter will effectively short-circuit retrieval,
* returning 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.
* @param string $url The URL to the content that should be attempted to be embedded.
* @param array $args Optional. Arguments, usually passed from a shortcode. Default empty.
*/
$pre = apply_filters( 'pre_oembed_result', null, $url, $args );
if ( null !== $pre ) {
return $pre;
}
$provider = $this->get_provider( $url, $args );
if ( ! $provider || false === $data = $this->fetch( $provider, $url, $args ) ) {
return false;
}
/**
* Filters the HTML returned by the oEmbed provider.
*
* @since 2.9.0
*
* @param string $data The returned oEmbed HTML.
* @param string $url URL of the content to be embedded.
* @param array $args Optional arguments, usually passed from a shortcode.
*/
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
* @access public
*
* @param string $url The URL that should be inspected for discovery `<link>` tags.
* @return false|string False on failure, otherwise the oEmbed provider URL.
*/
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 );
if ( $html = wp_remote_retrieve_body( $request ) ) {
/**
* Filters the link types that contain oEmbed provider URLs.
*
* @since 2.9.0
*
* @param array $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>
if ( $html_head_end = stripos( $html, '</head>' ) ) {
$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
* @access public
*
* @param string $provider The URL to the oEmbed provider.
* @param string $url The URL to the content that is desired to be embedded.
* @param array|string $args Optional. Arguments, usually passed from a shortcode. Default empty.
* @return false|object False on failure, otherwise the result in the form of an object.
*/
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 );
/**
* Filters the oEmbed URL to be fetched.
*
* @since 2.9.0
*
* @param string $provider URL of the oEmbed provider.
* @param string $url URL of the content to be embedded.
* @param array $args Optional arguments, usually passed from a shortcode.
*/
$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
* @access private
*
* @param string $provider_url_with_args URL to the provider with full arguments list (url, maxheight, etc.)
* @param string $format Format to use
* @return false|object|WP_Error False on failure, otherwise the result in the form of an object.
*/
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-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' );
if ( ! $body = wp_remote_retrieve_body( $response ) )
return false;
$parse_method = "_parse_$format";
return $this->$parse_method( $body );
}
/**
* Parses a json response body.
*
* @since 3.0.0
* @access private
*
* @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
* @access private
*
* @param string $response_body
* @return object|false
*/
private function _parse_xml( $response_body ) {
if ( ! function_exists( 'libxml_disable_entity_loader' ) )
return false;
$loader = libxml_disable_entity_loader( true );
$errors = libxml_use_internal_errors( true );
$return = $this->_parse_xml_body( $response_body );
libxml_use_internal_errors( $errors );
libxml_disable_entity_loader( $loader );
return $return;
}
/**
* Serves as a helper function for parsing an XML response body.
*
* @since 3.6.0
* @access private
*
* @param string $response_body
* @return object|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
* @access public
*
* @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 false|string False on error, otherwise the HTML needed to embed.
*/
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
* @access public
*
* @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 );
}
}
/**
* Returns the initialized WP_oEmbed object.
*
* @since 2.9.0
* @access private
*
* @staticvar WP_oEmbed $wp_oembed
*
* @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;
}
Reference in New Issue View Git Blame Copy Permalink