ru-se.com

feed.php (22966B)

---

 <?php
 /**
  * WordPress Feed API
  *
  * Many of the functions used in here belong in The Loop, or The Loop for the
  * Feeds.
  *
  * @package WordPress
  * @subpackage Feed
  * @since 2.1.0
  */
 
 /**
  * RSS container for the bloginfo function.
  *
  * You can retrieve anything that you can using the get_bloginfo() function.
  * Everything will be stripped of tags and characters converted, when the values
  * are retrieved for use in the feeds.
  *
  * @since 1.5.1
  *
  * @see get_bloginfo() For the list of possible values to display.
  *
  * @param string $show See get_bloginfo() for possible values.
  * @return string
  */
 function get_bloginfo_rss( $show = '' ) {
 	$info = strip_tags( get_bloginfo( $show ) );
 	/**
 	 * Filters the bloginfo for use in RSS feeds.
 	 *
 	 * @since 2.2.0
 	 *
 	 * @see convert_chars()
 	 * @see get_bloginfo()
 	 *
 	 * @param string $info Converted string value of the blog information.
 	 * @param string $show The type of blog information to retrieve.
 	 */
 	return apply_filters( 'get_bloginfo_rss', convert_chars( $info ), $show );
 }
 
 /**
  * Display RSS container for the bloginfo function.
  *
  * You can retrieve anything that you can using the get_bloginfo() function.
  * Everything will be stripped of tags and characters converted, when the values
  * are retrieved for use in the feeds.
  *
  * @since 0.71
  *
  * @see get_bloginfo() For the list of possible values to display.
  *
  * @param string $show See get_bloginfo() for possible values.
  */
 function bloginfo_rss( $show = '' ) {
 	/**
 	 * Filters the bloginfo for display in RSS feeds.
 	 *
 	 * @since 2.1.0
 	 *
 	 * @see get_bloginfo()
 	 *
 	 * @param string $rss_container RSS container for the blog information.
 	 * @param string $show          The type of blog information to retrieve.
 	 */
 	echo apply_filters( 'bloginfo_rss', get_bloginfo_rss( $show ), $show );
 }
 
 /**
  * Retrieve the default feed.
  *
  * The default feed is 'rss2', unless a plugin changes it through the
  * {@see 'default_feed'} filter.
  *
  * @since 2.5.0
  *
  * @return string Default feed, or for example 'rss2', 'atom', etc.
  */
 function get_default_feed() {
 	/**
 	 * Filters the default feed type.
 	 *
 	 * @since 2.5.0
 	 *
 	 * @param string $feed_type Type of default feed. Possible values include 'rss2', 'atom'.
 	 *                          Default 'rss2'.
 	 */
 	$default_feed = apply_filters( 'default_feed', 'rss2' );
 
 	return ( 'rss' === $default_feed ) ? 'rss2' : $default_feed;
 }
 
 /**
  * Retrieve the blog title for the feed title.
  *
  * @since 2.2.0
  * @since 4.4.0 The optional `$sep` parameter was deprecated and renamed to `$deprecated`.
  *
  * @param string $deprecated Unused..
  * @return string The document title.
  */
 function get_wp_title_rss( $deprecated = '&#8211;' ) {
 	if ( '&#8211;' !== $deprecated ) {
 		/* translators: %s: 'document_title_separator' filter name. */
 		_deprecated_argument( __FUNCTION__, '4.4.0', sprintf( __( 'Use the %s filter instead.' ), '<code>document_title_separator</code>' ) );
 	}
 
 	/**
 	 * Filters the blog title for use as the feed title.
 	 *
 	 * @since 2.2.0
 	 * @since 4.4.0 The `$sep` parameter was deprecated and renamed to `$deprecated`.
 	 *
 	 * @param string $title      The current blog title.
 	 * @param string $deprecated Unused.
 	 */
 	return apply_filters( 'get_wp_title_rss', wp_get_document_title(), $deprecated );
 }
 
 /**
  * Display the blog title for display of the feed title.
  *
  * @since 2.2.0
  * @since 4.4.0 The optional `$sep` parameter was deprecated and renamed to `$deprecated`.
  *
  * @param string $deprecated Unused.
  */
 function wp_title_rss( $deprecated = '&#8211;' ) {
 	if ( '&#8211;' !== $deprecated ) {
 		/* translators: %s: 'document_title_separator' filter name. */
 		_deprecated_argument( __FUNCTION__, '4.4.0', sprintf( __( 'Use the %s filter instead.' ), '<code>document_title_separator</code>' ) );
 	}
 
 	/**
 	 * Filters the blog title for display of the feed title.
 	 *
 	 * @since 2.2.0
 	 * @since 4.4.0 The `$sep` parameter was deprecated and renamed to `$deprecated`.
 	 *
 	 * @see get_wp_title_rss()
 	 *
 	 * @param string $wp_title_rss The current blog title.
 	 * @param string $deprecated   Unused.
 	 */
 	echo apply_filters( 'wp_title_rss', get_wp_title_rss(), $deprecated );
 }
 
 /**
  * Retrieve the current post title for the feed.
  *
  * @since 2.0.0
  *
  * @return string Current post title.
  */
 function get_the_title_rss() {
 	$title = get_the_title();
 
 	/**
 	 * Filters the post title for use in a feed.
 	 *
 	 * @since 1.2.0
 	 *
 	 * @param string $title The current post title.
 	 */
 	return apply_filters( 'the_title_rss', $title );
 }
 
 /**
  * Display the post title in the feed.
  *
  * @since 0.71
  */
 function the_title_rss() {
 	echo get_the_title_rss();
 }
 
 /**
  * Retrieve the post content for feeds.
  *
  * @since 2.9.0
  *
  * @see get_the_content()
  *
  * @param string $feed_type The type of feed. rss2 | atom | rss | rdf
  * @return string The filtered content.
  */
 function get_the_content_feed( $feed_type = null ) {
 	if ( ! $feed_type ) {
 		$feed_type = get_default_feed();
 	}
 
 	/** This filter is documented in wp-includes/post-template.php */
 	$content = apply_filters( 'the_content', get_the_content() );
 	$content = str_replace( ']]>', ']]&gt;', $content );
 
 	/**
 	 * Filters the post content for use in feeds.
 	 *
 	 * @since 2.9.0
 	 *
 	 * @param string $content   The current post content.
 	 * @param string $feed_type Type of feed. Possible values include 'rss2', 'atom'.
 	 *                          Default 'rss2'.
 	 */
 	return apply_filters( 'the_content_feed', $content, $feed_type );
 }
 
 /**
  * Display the post content for feeds.
  *
  * @since 2.9.0
  *
  * @param string $feed_type The type of feed. rss2 | atom | rss | rdf
  */
 function the_content_feed( $feed_type = null ) {
 	echo get_the_content_feed( $feed_type );
 }
 
 /**
  * Display the post excerpt for the feed.
  *
  * @since 0.71
  */
 function the_excerpt_rss() {
 	$output = get_the_excerpt();
 	/**
 	 * Filters the post excerpt for a feed.
 	 *
 	 * @since 1.2.0
 	 *
 	 * @param string $output The current post excerpt.
 	 */
 	echo apply_filters( 'the_excerpt_rss', $output );
 }
 
 /**
  * Display the permalink to the post for use in feeds.
  *
  * @since 2.3.0
  */
 function the_permalink_rss() {
 	/**
 	 * Filters the permalink to the post for use in feeds.
 	 *
 	 * @since 2.3.0
 	 *
 	 * @param string $post_permalink The current post permalink.
 	 */
 	echo esc_url( apply_filters( 'the_permalink_rss', get_permalink() ) );
 }
 
 /**
  * Outputs the link to the comments for the current post in an xml safe way
  *
  * @since 3.0.0
  */
 function comments_link_feed() {
 	/**
 	 * Filters the comments permalink for the current post.
 	 *
 	 * @since 3.6.0
 	 *
 	 * @param string $comment_permalink The current comment permalink with
 	 *                                  '#comments' appended.
 	 */
 	echo esc_url( apply_filters( 'comments_link_feed', get_comments_link() ) );
 }
 
 /**
  * Display the feed GUID for the current comment.
  *
  * @since 2.5.0
  *
  * @param int|WP_Comment $comment_id Optional comment object or ID. Defaults to global comment object.
  */
 function comment_guid( $comment_id = null ) {
 	echo esc_url( get_comment_guid( $comment_id ) );
 }
 
 /**
  * Retrieve the feed GUID for the current comment.
  *
  * @since 2.5.0
  *
  * @param int|WP_Comment $comment_id Optional comment object or ID. Defaults to global comment object.
  * @return string|false GUID for comment on success, false on failure.
  */
 function get_comment_guid( $comment_id = null ) {
 	$comment = get_comment( $comment_id );
 
 	if ( ! is_object( $comment ) ) {
 		return false;
 	}
 
 	return get_the_guid( $comment->comment_post_ID ) . '#comment-' . $comment->comment_ID;
 }
 
 /**
  * Display the link to the comments.
  *
  * @since 1.5.0
  * @since 4.4.0 Introduced the `$comment` argument.
  *
  * @param int|WP_Comment $comment Optional. Comment object or ID. Defaults to global comment object.
  */
 function comment_link( $comment = null ) {
 	/**
 	 * Filters the current comment's permalink.
 	 *
 	 * @since 3.6.0
 	 *
 	 * @see get_comment_link()
 	 *
 	 * @param string $comment_permalink The current comment permalink.
 	 */
 	echo esc_url( apply_filters( 'comment_link', get_comment_link( $comment ) ) );
 }
 
 /**
  * Retrieve the current comment author for use in the feeds.
  *
  * @since 2.0.0
  *
  * @return string Comment Author
  */
 function get_comment_author_rss() {
 	/**
 	 * Filters the current comment author for use in a feed.
 	 *
 	 * @since 1.5.0
 	 *
 	 * @see get_comment_author()
 	 *
 	 * @param string $comment_author The current comment author.
 	 */
 	return apply_filters( 'comment_author_rss', get_comment_author() );
 }
 
 /**
  * Display the current comment author in the feed.
  *
  * @since 1.0.0
  */
 function comment_author_rss() {
 	echo get_comment_author_rss();
 }
 
 /**
  * Display the current comment content for use in the feeds.
  *
  * @since 1.0.0
  */
 function comment_text_rss() {
 	$comment_text = get_comment_text();
 	/**
 	 * Filters the current comment content for use in a feed.
 	 *
 	 * @since 1.5.0
 	 *
 	 * @param string $comment_text The content of the current comment.
 	 */
 	$comment_text = apply_filters( 'comment_text_rss', $comment_text );
 	echo $comment_text;
 }
 
 /**
  * Retrieve all of the post categories, formatted for use in feeds.
  *
  * All of the categories for the current post in the feed loop, will be
  * retrieved and have feed markup added, so that they can easily be added to the
  * RSS2, Atom, or RSS1 and RSS0.91 RDF feeds.
  *
  * @since 2.1.0
  *
  * @param string $type Optional, default is the type returned by get_default_feed().
  * @return string All of the post categories for displaying in the feed.
  */
 function get_the_category_rss( $type = null ) {
 	if ( empty( $type ) ) {
 		$type = get_default_feed();
 	}
 	$categories = get_the_category();
 	$tags       = get_the_tags();
 	$the_list   = '';
 	$cat_names  = array();
 
 	$filter = 'rss';
 	if ( 'atom' === $type ) {
 		$filter = 'raw';
 	}
 
 	if ( ! empty( $categories ) ) {
 		foreach ( (array) $categories as $category ) {
 			$cat_names[] = sanitize_term_field( 'name', $category->name, $category->term_id, 'category', $filter );
 		}
 	}
 
 	if ( ! empty( $tags ) ) {
 		foreach ( (array) $tags as $tag ) {
 			$cat_names[] = sanitize_term_field( 'name', $tag->name, $tag->term_id, 'post_tag', $filter );
 		}
 	}
 
 	$cat_names = array_unique( $cat_names );
 
 	foreach ( $cat_names as $cat_name ) {
 		if ( 'rdf' === $type ) {
 			$the_list .= "\t\t<dc:subject><![CDATA[$cat_name]]></dc:subject>\n";
 		} elseif ( 'atom' === $type ) {
 			$the_list .= sprintf( '<category scheme="%1$s" term="%2$s" />', esc_attr( get_bloginfo_rss( 'url' ) ), esc_attr( $cat_name ) );
 		} else {
 			$the_list .= "\t\t<category><![CDATA[" . html_entity_decode( $cat_name, ENT_COMPAT, get_option( 'blog_charset' ) ) . "]]></category>\n";
 		}
 	}
 
 	/**
 	 * Filters all of the post categories for display in a feed.
 	 *
 	 * @since 1.2.0
 	 *
 	 * @param string $the_list All of the RSS post categories.
 	 * @param string $type     Type of feed. Possible values include 'rss2', 'atom'.
 	 *                         Default 'rss2'.
 	 */
 	return apply_filters( 'the_category_rss', $the_list, $type );
 }
 
 /**
  * Display the post categories in the feed.
  *
  * @since 0.71
  *
  * @see get_the_category_rss() For better explanation.
  *
  * @param string $type Optional, default is the type returned by get_default_feed().
  */
 function the_category_rss( $type = null ) {
 	echo get_the_category_rss( $type );
 }
 
 /**
  * Display the HTML type based on the blog setting.
  *
  * The two possible values are either 'xhtml' or 'html'.
  *
  * @since 2.2.0
  */
 function html_type_rss() {
 	$type = get_bloginfo( 'html_type' );
 	if ( strpos( $type, 'xhtml' ) !== false ) {
 		$type = 'xhtml';
 	} else {
 		$type = 'html';
 	}
 	echo $type;
 }
 
 /**
  * Display the rss enclosure for the current post.
  *
  * Uses the global $post to check whether the post requires a password and if
  * the user has the password for the post. If not then it will return before
  * displaying.
  *
  * Also uses the function get_post_custom() to get the post's 'enclosure'
  * metadata field and parses the value to display the enclosure(s). The
  * enclosure(s) consist of enclosure HTML tag(s) with a URI and other
  * attributes.
  *
  * @since 1.5.0
  */
 function rss_enclosure() {
 	if ( post_password_required() ) {
 		return;
 	}
 
 	foreach ( (array) get_post_custom() as $key => $val ) {
 		if ( 'enclosure' === $key ) {
 			foreach ( (array) $val as $enc ) {
 				$enclosure = explode( "\n", $enc );
 
 				// Only get the first element, e.g. 'audio/mpeg' from 'audio/mpeg mpga mp2 mp3'.
 				$t    = preg_split( '/[ \t]/', trim( $enclosure[2] ) );
 				$type = $t[0];
 
 				/**
 				 * Filters the RSS enclosure HTML link tag for the current post.
 				 *
 				 * @since 2.2.0
 				 *
 				 * @param string $html_link_tag The HTML link tag with a URI and other attributes.
 				 */
 				echo apply_filters( 'rss_enclosure', '<enclosure url="' . esc_url( trim( $enclosure[0] ) ) . '" length="' . absint( trim( $enclosure[1] ) ) . '" type="' . esc_attr( $type ) . '" />' . "\n" );
 			}
 		}
 	}
 }
 
 /**
  * Display the atom enclosure for the current post.
  *
  * Uses the global $post to check whether the post requires a password and if
  * the user has the password for the post. If not then it will return before
  * displaying.
  *
  * Also uses the function get_post_custom() to get the post's 'enclosure'
  * metadata field and parses the value to display the enclosure(s). The
  * enclosure(s) consist of link HTML tag(s) with a URI and other attributes.
  *
  * @since 2.2.0
  */
 function atom_enclosure() {
 	if ( post_password_required() ) {
 		return;
 	}
 
 	foreach ( (array) get_post_custom() as $key => $val ) {
 		if ( 'enclosure' === $key ) {
 			foreach ( (array) $val as $enc ) {
 				$enclosure = explode( "\n", $enc );
 
 				$url    = '';
 				$type   = '';
 				$length = 0;
 
 				$mimes = get_allowed_mime_types();
 
 				// Parse URL.
 				if ( isset( $enclosure[0] ) && is_string( $enclosure[0] ) ) {
 					$url = trim( $enclosure[0] );
 				}
 
 				// Parse length and type.
 				for ( $i = 1; $i <= 2; $i++ ) {
 					if ( isset( $enclosure[ $i ] ) ) {
 						if ( is_numeric( $enclosure[ $i ] ) ) {
 							$length = trim( $enclosure[ $i ] );
 						} elseif ( in_array( $enclosure[ $i ], $mimes, true ) ) {
 							$type = trim( $enclosure[ $i ] );
 						}
 					}
 				}
 
 				$html_link_tag = sprintf(
 					"<link href=\"%s\" rel=\"enclosure\" length=\"%d\" type=\"%s\" />\n",
 					esc_url( $url ),
 					esc_attr( $length ),
 					esc_attr( $type )
 				);
 
 				/**
 				 * Filters the atom enclosure HTML link tag for the current post.
 				 *
 				 * @since 2.2.0
 				 *
 				 * @param string $html_link_tag The HTML link tag with a URI and other attributes.
 				 */
 				echo apply_filters( 'atom_enclosure', $html_link_tag );
 			}
 		}
 	}
 }
 
 /**
  * Determine the type of a string of data with the data formatted.
  *
  * Tell whether the type is text, HTML, or XHTML, per RFC 4287 section 3.1.
  *
  * In the case of WordPress, text is defined as containing no markup,
  * XHTML is defined as "well formed", and HTML as tag soup (i.e., the rest).
  *
  * Container div tags are added to XHTML values, per section 3.1.1.3.
  *
  * @link http://www.atomenabled.org/developers/syndication/atom-format-spec.php#rfc.section.3.1
  *
  * @since 2.5.0
  *
  * @param string $data Input string
  * @return array array(type, value)
  */
 function prep_atom_text_construct( $data ) {
 	if ( strpos( $data, '<' ) === false && strpos( $data, '&' ) === false ) {
 		return array( 'text', $data );
 	}
 
 	if ( ! function_exists( 'xml_parser_create' ) ) {
 		trigger_error( __( "PHP's XML extension is not available. Please contact your hosting provider to enable PHP's XML extension." ) );
 
 		return array( 'html', "<![CDATA[$data]]>" );
 	}
 
 	$parser = xml_parser_create();
 	xml_parse( $parser, '<div>' . $data . '</div>', true );
 	$code = xml_get_error_code( $parser );
 	xml_parser_free( $parser );
 	unset( $parser );
 
 	if ( ! $code ) {
 		if ( strpos( $data, '<' ) === false ) {
 			return array( 'text', $data );
 		} else {
 			$data = "<div xmlns='http://www.w3.org/1999/xhtml'>$data</div>";
 			return array( 'xhtml', $data );
 		}
 	}
 
 	if ( strpos( $data, ']]>' ) === false ) {
 		return array( 'html', "<![CDATA[$data]]>" );
 	} else {
 		return array( 'html', htmlspecialchars( $data ) );
 	}
 }
 
 /**
  * Displays Site Icon in atom feeds.
  *
  * @since 4.3.0
  *
  * @see get_site_icon_url()
  */
 function atom_site_icon() {
 	$url = get_site_icon_url( 32 );
 	if ( $url ) {
 		echo '<icon>' . convert_chars( $url ) . "</icon>\n";
 	}
 }
 
 /**
  * Displays Site Icon in RSS2.
  *
  * @since 4.3.0
  */
 function rss2_site_icon() {
 	$rss_title = get_wp_title_rss();
 	if ( empty( $rss_title ) ) {
 		$rss_title = get_bloginfo_rss( 'name' );
 	}
 
 	$url = get_site_icon_url( 32 );
 	if ( $url ) {
 		echo '
 <image>
 	<url>' . convert_chars( $url ) . '</url>
 	<title>' . $rss_title . '</title>
 	<link>' . get_bloginfo_rss( 'url' ) . '</link>
 	<width>32</width>
 	<height>32</height>
 </image> ' . "\n";
 	}
 }
 
 /**
  * Returns the link for the currently displayed feed.
  *
  * @since 5.3.0
  *
  * @return string Correct link for the atom:self element.
  */
 function get_self_link() {
 	$host = parse_url( home_url() );
 	return set_url_scheme( 'http://' . $host['host'] . wp_unslash( $_SERVER['REQUEST_URI'] ) );
 }
 
 /**
  * Display the link for the currently displayed feed in a XSS safe way.
  *
  * Generate a correct link for the atom:self element.
  *
  * @since 2.5.0
  */
 function self_link() {
 	/**
 	 * Filters the current feed URL.
 	 *
 	 * @since 3.6.0
 	 *
 	 * @see set_url_scheme()
 	 * @see wp_unslash()
 	 *
 	 * @param string $feed_link The link for the feed with set URL scheme.
 	 */
 	echo esc_url( apply_filters( 'self_link', get_self_link() ) );
 }
 
 /**
  * Get the UTC time of the most recently modified post from WP_Query.
  *
  * If viewing a comment feed, the time of the most recently modified
  * comment will be returned.
  *
  * @global WP_Query $wp_query WordPress Query object.
  *
  * @since 5.2.0
  *
  * @param string $format Date format string to return the time in.
  * @return string|false The time in requested format, or false on failure.
  */
 function get_feed_build_date( $format ) {
 	global $wp_query;
 
 	$datetime          = false;
 	$max_modified_time = false;
 	$utc               = new DateTimeZone( 'UTC' );
 
 	if ( ! empty( $wp_query ) && $wp_query->have_posts() ) {
 		// Extract the post modified times from the posts.
 		$modified_times = wp_list_pluck( $wp_query->posts, 'post_modified_gmt' );
 
 		// If this is a comment feed, check those objects too.
 		if ( $wp_query->is_comment_feed() && $wp_query->comment_count ) {
 			// Extract the comment modified times from the comments.
 			$comment_times = wp_list_pluck( $wp_query->comments, 'comment_date_gmt' );
 
 			// Add the comment times to the post times for comparison.
 			$modified_times = array_merge( $modified_times, $comment_times );
 		}
 
 		// Determine the maximum modified time.
 		$datetime = date_create_immutable_from_format( 'Y-m-d H:i:s', max( $modified_times ), $utc );
 	}
 
 	if ( false === $datetime ) {
 		// Fall back to last time any post was modified or published.
 		$datetime = date_create_immutable_from_format( 'Y-m-d H:i:s', get_lastpostmodified( 'GMT' ), $utc );
 	}
 
 	if ( false !== $datetime ) {
 		$max_modified_time = $datetime->format( $format );
 	}
 
 	/**
 	 * Filters the date the last post or comment in the query was modified.
 	 *
 	 * @since 5.2.0
 	 *
 	 * @param string|false $max_modified_time Date the last post or comment was modified in the query, in UTC.
 	 *                                        False on failure.
 	 * @param string       $format            The date format requested in get_feed_build_date().
 	 */
 	return apply_filters( 'get_feed_build_date', $max_modified_time, $format );
 }
 
 /**
  * Return the content type for specified feed type.
  *
  * @since 2.8.0
  *
  * @param string $type Type of feed. Possible values include 'rss', rss2', 'atom', and 'rdf'.
  */
 function feed_content_type( $type = '' ) {
 	if ( empty( $type ) ) {
 		$type = get_default_feed();
 	}
 
 	$types = array(
 		'rss'      => 'application/rss+xml',
 		'rss2'     => 'application/rss+xml',
 		'rss-http' => 'text/xml',
 		'atom'     => 'application/atom+xml',
 		'rdf'      => 'application/rdf+xml',
 	);
 
 	$content_type = ( ! empty( $types[ $type ] ) ) ? $types[ $type ] : 'application/octet-stream';
 
 	/**
 	 * Filters the content type for a specific feed type.
 	 *
 	 * @since 2.8.0
 	 *
 	 * @param string $content_type Content type indicating the type of data that a feed contains.
 	 * @param string $type         Type of feed. Possible values include 'rss', rss2', 'atom', and 'rdf'.
 	 */
 	return apply_filters( 'feed_content_type', $content_type, $type );
 }
 
 /**
  * Build SimplePie object based on RSS or Atom feed from URL.
  *
  * @since 2.8.0
  *
  * @param string|string[] $url URL of feed to retrieve. If an array of URLs, the feeds are merged
  *                             using SimplePie's multifeed feature.
  *                             See also {@link http://simplepie.org/wiki/faq/typical_multifeed_gotchas}
  * @return SimplePie|WP_Error SimplePie object on success or WP_Error object on failure.
  */
 function fetch_feed( $url ) {
 	if ( ! class_exists( 'SimplePie', false ) ) {
 		require_once ABSPATH . WPINC . '/class-simplepie.php';
 	}
 
 	require_once ABSPATH . WPINC . '/class-wp-feed-cache-transient.php';
 	require_once ABSPATH . WPINC . '/class-wp-simplepie-file.php';
 	require_once ABSPATH . WPINC . '/class-wp-simplepie-sanitize-kses.php';
 
 	$feed = new SimplePie();
 
 	$feed->set_sanitize_class( 'WP_SimplePie_Sanitize_KSES' );
 	// We must manually overwrite $feed->sanitize because SimplePie's constructor
 	// sets it before we have a chance to set the sanitization class.
 	$feed->sanitize = new WP_SimplePie_Sanitize_KSES();
 
 	// Register the cache handler using the recommended method for SimplePie 1.3 or later.
 	if ( method_exists( 'SimplePie_Cache', 'register' ) ) {
 		SimplePie_Cache::register( 'wp_transient', 'WP_Feed_Cache_Transient' );
 		$feed->set_cache_location( 'wp_transient' );
 	} else {
 		// Back-compat for SimplePie 1.2.x.
 		require_once ABSPATH . WPINC . '/class-wp-feed-cache.php';
 		$feed->set_cache_class( 'WP_Feed_Cache' );
 	}
 
 	$feed->set_file_class( 'WP_SimplePie_File' );
 
 	$feed->set_feed_url( $url );
 	/** This filter is documented in wp-includes/class-wp-feed-cache-transient.php */
 	$feed->set_cache_duration( apply_filters( 'wp_feed_cache_transient_lifetime', 12 * HOUR_IN_SECONDS, $url ) );
 
 	/**
 	 * Fires just before processing the SimplePie feed object.
 	 *
 	 * @since 3.0.0
 	 *
 	 * @param SimplePie       $feed SimplePie feed object (passed by reference).
 	 * @param string|string[] $url  URL of feed or array of URLs of feeds to retrieve.
 	 */
 	do_action_ref_array( 'wp_feed_options', array( &$feed, $url ) );
 
 	$feed->init();
 	$feed->set_output_encoding( get_option( 'blog_charset' ) );
 
 	if ( $feed->error() ) {
 		return new WP_Error( 'simplepie-error', $feed->error() );
 	}
 
 	return $feed;
 }