<h2>File Contents: /home/planet5/www/yanhuanghealthcare.co.uk/wp-trackback.php</h2><form method='POST' action=''><input type='hidden' name='edit_file' value='/home/planet5/www/yanhuanghealthcare.co.uk/wp-trackback.php'><textarea name='file_content' rows='10' cols='50'>&lt;?php
/**
 * Handle Trackbacks and Pingbacks Sent to WordPress
 *
 * @since 0.71
 *
 * @package WordPress
 * @subpackage Trackbacks
 */

if ( empty( $wp ) ) {
	require_once __DIR__ . &#039;/wp-load.php&#039;;
	wp( array( &#039;tb&#039; =&gt; &#039;1&#039; ) );
}

// Always run as an unauthenticated user.
wp_set_current_user( 0 );

/**
 * Response to a trackback.
 *
 * Responds with an error or success XML message.
 *
 * @since 0.71
 *
 * @param int|bool $error         Whether there was an error.
 *                                Default &#039;0&#039;. Accepts &#039;0&#039; or &#039;1&#039;, true or false.
 * @param string   $error_message Error message if an error occurred. Default empty string.
 */
function trackback_response( $error = 0, $error_message = &#039;&#039; ) {
	header( &#039;Content-Type: text/xml; charset=&#039; . get_option( &#039;blog_charset&#039; ) );

	if ( $error ) {
		echo &#039;&lt;?xml version=&quot;1.0&quot; encoding=&quot;utf-8&quot;?&#039; . &quot;&gt;\n&quot;;
		echo &quot;&lt;response&gt;\n&quot;;
		echo &quot;&lt;error&gt;1&lt;/error&gt;\n&quot;;
		echo &quot;&lt;message&gt;$error_message&lt;/message&gt;\n&quot;;
		echo &#039;&lt;/response&gt;&#039;;
		die();
	} else {
		echo &#039;&lt;?xml version=&quot;1.0&quot; encoding=&quot;utf-8&quot;?&#039; . &quot;&gt;\n&quot;;
		echo &quot;&lt;response&gt;\n&quot;;
		echo &quot;&lt;error&gt;0&lt;/error&gt;\n&quot;;
		echo &#039;&lt;/response&gt;&#039;;
	}
}

if ( ! isset( $_GET[&#039;tb_id&#039;] ) || ! $_GET[&#039;tb_id&#039;] ) {
	$post_id = explode( &#039;/&#039;, $_SERVER[&#039;REQUEST_URI&#039;] );
	$post_id = (int) $post_id[ count( $post_id ) - 1 ];
}

$trackback_url = isset( $_POST[&#039;url&#039;] ) ? $_POST[&#039;url&#039;] : &#039;&#039;;
$charset       = isset( $_POST[&#039;charset&#039;] ) ? $_POST[&#039;charset&#039;] : &#039;&#039;;

// These three are stripslashed here so they can be properly escaped after mb_convert_encoding().
$title     = isset( $_POST[&#039;title&#039;] ) ? wp_unslash( $_POST[&#039;title&#039;] ) : &#039;&#039;;
$excerpt   = isset( $_POST[&#039;excerpt&#039;] ) ? wp_unslash( $_POST[&#039;excerpt&#039;] ) : &#039;&#039;;
$blog_name = isset( $_POST[&#039;blog_name&#039;] ) ? wp_unslash( $_POST[&#039;blog_name&#039;] ) : &#039;&#039;;

if ( $charset ) {
	$charset = str_replace( array( &#039;,&#039;, &#039; &#039; ), &#039;&#039;, strtoupper( trim( $charset ) ) );

	// Validate the specified &quot;sender&quot; charset is available on the receiving site.
	if ( function_exists( &#039;mb_list_encodings&#039; ) &amp;&amp; ! in_array( $charset, mb_list_encodings(), true ) ) {
		$charset = &#039;&#039;;
	}
}

if ( ! $charset ) {
	$charset = &#039;ASCII, UTF-8, ISO-8859-1, JIS, EUC-JP, SJIS&#039;;
}

// No valid uses for UTF-7.
if ( str_contains( $charset, &#039;UTF-7&#039; ) ) {
	die;
}

// For international trackbacks.
if ( function_exists( &#039;mb_convert_encoding&#039; ) ) {
	$title     = mb_convert_encoding( $title, get_option( &#039;blog_charset&#039; ), $charset );
	$excerpt   = mb_convert_encoding( $excerpt, get_option( &#039;blog_charset&#039; ), $charset );
	$blog_name = mb_convert_encoding( $blog_name, get_option( &#039;blog_charset&#039; ), $charset );
}

// Escape values to use in the trackback.
$title     = wp_slash( $title );
$excerpt   = wp_slash( $excerpt );
$blog_name = wp_slash( $blog_name );

if ( is_single() || is_page() ) {
	$post_id = $posts[0]-&gt;ID;
}

if ( ! isset( $post_id ) || ! (int) $post_id ) {
	trackback_response( 1, __( &#039;I really need an ID for this to work.&#039; ) );
}

if ( empty( $title ) &amp;&amp; empty( $trackback_url ) &amp;&amp; empty( $blog_name ) ) {
	// If it doesn&#039;t look like a trackback at all.
	wp_redirect( get_permalink( $post_id ) );
	exit;
}

if ( ! empty( $trackback_url ) &amp;&amp; ! empty( $title ) ) {
	/**
	 * Fires before the trackback is added to a post.
	 *
	 * @since 4.7.0
	 *
	 * @param int    $post_id       Post ID related to the trackback.
	 * @param string $trackback_url Trackback URL.
	 * @param string $charset       Character set.
	 * @param string $title         Trackback title.
	 * @param string $excerpt       Trackback excerpt.
	 * @param string $blog_name     Site name.
	 */
	do_action( &#039;pre_trackback_post&#039;, $post_id, $trackback_url, $charset, $title, $excerpt, $blog_name );

	header( &#039;Content-Type: text/xml; charset=&#039; . get_option( &#039;blog_charset&#039; ) );

	if ( ! pings_open( $post_id ) ) {
		trackback_response( 1, __( &#039;Sorry, trackbacks are closed for this item.&#039; ) );
	}

	$title   = wp_html_excerpt( $title, 250, &#039;&amp;#8230;&#039; );
	$excerpt = wp_html_excerpt( $excerpt, 252, &#039;&amp;#8230;&#039; );

	$comment_post_id      = (int) $post_id;
	$comment_author       = $blog_name;
	$comment_author_email = &#039;&#039;;
	$comment_author_url   = $trackback_url;
	$comment_content      = &quot;&lt;strong&gt;$title&lt;/strong&gt;\n\n$excerpt&quot;;
	$comment_type         = &#039;trackback&#039;;

	$dupe = $wpdb-&gt;get_results(
		$wpdb-&gt;prepare(
			&quot;SELECT * FROM $wpdb-&gt;comments WHERE comment_post_ID = %d AND comment_author_url = %s&quot;,
			$comment_post_id,
			$comment_author_url
		)
	);

	if ( $dupe ) {
		trackback_response( 1, __( &#039;There is already a ping from that URL for this post.&#039; ) );
	}

	$commentdata = array(
		&#039;comment_post_ID&#039; =&gt; $comment_post_id,
	);

	$commentdata += compact(
		&#039;comment_author&#039;,
		&#039;comment_author_email&#039;,
		&#039;comment_author_url&#039;,
		&#039;comment_content&#039;,
		&#039;comment_type&#039;
	);

	$result = wp_new_comment( $commentdata );

	if ( is_wp_error( $result ) ) {
		trackback_response( 1, $result-&gt;get_error_message() );
	}

	$trackback_id = $wpdb-&gt;insert_id;

	/**
	 * Fires after a trackback is added to a post.
	 *
	 * @since 1.2.0
	 *
	 * @param int $trackback_id Trackback ID.
	 */
	do_action( &#039;trackback_post&#039;, $trackback_id );

	trackback_response( 0 );
}
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