diff -r c7c34916027a -r 177826044cd9 wp/wp-trackback.php
--- a/wp/wp-trackback.php	Mon Oct 14 18:06:33 2019 +0200
+++ b/wp/wp-trackback.php	Mon Oct 14 18:28:13 2019 +0200
@@ -8,7 +8,7 @@
  * @subpackage Trackbacks
  */
 
-if (empty($wp)) {
+if ( empty( $wp ) ) {
 	require_once( dirname( __FILE__ ) . '/wp-load.php' );
 	wp( array( 'tb' => '1' ) );
 }
@@ -24,107 +24,113 @@
  *                              Default '0'. Accepts '0' or '1', true or false.
  * @param string $error_message Error message if an error occurred.
  */
-function trackback_response($error = 0, $error_message = '') {
-	header('Content-Type: text/xml; charset=' . get_option('blog_charset') );
-	if ($error) {
-		echo '<?xml version="1.0" encoding="utf-8"?'.">\n";
+function trackback_response( $error = 0, $error_message = '' ) {
+	header( 'Content-Type: text/xml; charset=' . get_option( 'blog_charset' ) );
+	if ( $error ) {
+		echo '<?xml version="1.0" encoding="utf-8"?' . ">\n";
 		echo "<response>\n";
 		echo "<error>1</error>\n";
 		echo "<message>$error_message</message>\n";
-		echo "</response>";
+		echo '</response>';
 		die();
 	} else {
-		echo '<?xml version="1.0" encoding="utf-8"?'.">\n";
+		echo '<?xml version="1.0" encoding="utf-8"?' . ">\n";
 		echo "<response>\n";
 		echo "<error>0</error>\n";
-		echo "</response>";
+		echo '</response>';
 	}
 }
 
 // Trackback is done by a POST.
 $request_array = 'HTTP_POST_VARS';
 
-if ( !isset($_GET['tb_id']) || !$_GET['tb_id'] ) {
-	$tb_id = explode('/', $_SERVER['REQUEST_URI']);
-	$tb_id = intval( $tb_id[ count($tb_id) - 1 ] );
+if ( ! isset( $_GET['tb_id'] ) || ! $_GET['tb_id'] ) {
+	$tb_id = explode( '/', $_SERVER['REQUEST_URI'] );
+	$tb_id = intval( $tb_id[ count( $tb_id ) - 1 ] );
 }
 
-$tb_url  = isset($_POST['url'])     ? $_POST['url']     : '';
-$charset = isset($_POST['charset']) ? $_POST['charset'] : '';
+$tb_url  = isset( $_POST['url'] ) ? $_POST['url'] : '';
+$charset = isset( $_POST['charset'] ) ? $_POST['charset'] : '';
 
 // These three are stripslashed here so they can be properly escaped after mb_convert_encoding().
-$title     = isset($_POST['title'])     ? wp_unslash($_POST['title'])      : '';
-$excerpt   = isset($_POST['excerpt'])   ? wp_unslash($_POST['excerpt'])    : '';
-$blog_name = isset($_POST['blog_name']) ? wp_unslash($_POST['blog_name'])  : '';
+$title     = isset( $_POST['title'] ) ? wp_unslash( $_POST['title'] ) : '';
+$excerpt   = isset( $_POST['excerpt'] ) ? wp_unslash( $_POST['excerpt'] ) : '';
+$blog_name = isset( $_POST['blog_name'] ) ? wp_unslash( $_POST['blog_name'] ) : '';
 
-if ($charset)
-	$charset = str_replace( array(',', ' '), '', strtoupper( trim($charset) ) );
-else
+if ( $charset ) {
+	$charset = str_replace( array( ',', ' ' ), '', strtoupper( trim( $charset ) ) );
+} else {
 	$charset = 'ASCII, UTF-8, ISO-8859-1, JIS, EUC-JP, SJIS';
+}
 
 // No valid uses for UTF-7.
-if ( false !== strpos($charset, 'UTF-7') )
+if ( false !== strpos( $charset, 'UTF-7' ) ) {
 	die;
+}
 
 // For international trackbacks.
-if ( function_exists('mb_convert_encoding') ) {
-	$title     = mb_convert_encoding($title, get_option('blog_charset'), $charset);
-	$excerpt   = mb_convert_encoding($excerpt, get_option('blog_charset'), $charset);
-	$blog_name = mb_convert_encoding($blog_name, get_option('blog_charset'), $charset);
+if ( function_exists( 'mb_convert_encoding' ) ) {
+	$title     = mb_convert_encoding( $title, get_option( 'blog_charset' ), $charset );
+	$excerpt   = mb_convert_encoding( $excerpt, get_option( 'blog_charset' ), $charset );
+	$blog_name = mb_convert_encoding( $blog_name, get_option( 'blog_charset' ), $charset );
 }
 
 // Now that mb_convert_encoding() has been given a swing, we need to escape these three.
-$title     = wp_slash($title);
-$excerpt   = wp_slash($excerpt);
-$blog_name = wp_slash($blog_name);
+$title     = wp_slash( $title );
+$excerpt   = wp_slash( $excerpt );
+$blog_name = wp_slash( $blog_name );
 
-if ( is_single() || is_page() )
+if ( is_single() || is_page() ) {
 	$tb_id = $posts[0]->ID;
+}
 
-if ( !isset($tb_id) || !intval( $tb_id ) )
+if ( ! isset( $tb_id ) || ! intval( $tb_id ) ) {
 	trackback_response( 1, __( 'I really need an ID for this to work.' ) );
+}
 
-if (empty($title) && empty($tb_url) && empty($blog_name)) {
+if ( empty( $title ) && empty( $tb_url ) && empty( $blog_name ) ) {
 	// If it doesn't look like a trackback at all.
-	wp_redirect(get_permalink($tb_id));
+	wp_redirect( get_permalink( $tb_id ) );
 	exit;
 }
 
-if ( !empty($tb_url) && !empty($title) ) {
+if ( ! empty( $tb_url ) && ! empty( $title ) ) {
 	/**
-	* Fires before the trackback is added to a post.
-	*
-	* @since 4.7.0
-	*
-	* @param int    $tb_id     Post ID related to the trackback.
-	* @param string $tb_url    Trackback URL.
-	* @param string $charset   Character Set.
-	* @param string $title     Trackback Title.
-	* @param string $excerpt   Trackback Excerpt.
-	* @param string $blog_name Blog Name.
-	*/
+	 * Fires before the trackback is added to a post.
+	 *
+	 * @since 4.7.0
+	 *
+	 * @param int    $tb_id     Post ID related to the trackback.
+	 * @param string $tb_url    Trackback URL.
+	 * @param string $charset   Character Set.
+	 * @param string $title     Trackback Title.
+	 * @param string $excerpt   Trackback Excerpt.
+	 * @param string $blog_name Blog Name.
+	 */
 	do_action( 'pre_trackback_post', $tb_id, $tb_url, $charset, $title, $excerpt, $blog_name );
 
-	header('Content-Type: text/xml; charset=' . get_option('blog_charset') );
+	header( 'Content-Type: text/xml; charset=' . get_option( 'blog_charset' ) );
 
-	if ( !pings_open($tb_id) )
+	if ( ! pings_open( $tb_id ) ) {
 		trackback_response( 1, __( 'Sorry, trackbacks are closed for this item.' ) );
+	}
 
-	$title =  wp_html_excerpt( $title, 250, '&#8230;' );
+	$title   = wp_html_excerpt( $title, 250, '&#8230;' );
 	$excerpt = wp_html_excerpt( $excerpt, 252, '&#8230;' );
 
-	$comment_post_ID = (int) $tb_id;
-	$comment_author = $blog_name;
+	$comment_post_ID      = (int) $tb_id;
+	$comment_author       = $blog_name;
 	$comment_author_email = '';
-	$comment_author_url = $tb_url;
-	$comment_content = "<strong>$title</strong>\n\n$excerpt";
-	$comment_type = 'trackback';
+	$comment_author_url   = $tb_url;
+	$comment_content      = "<strong>$title</strong>\n\n$excerpt";
+	$comment_type         = 'trackback';
 
-	$dupe = $wpdb->get_results( $wpdb->prepare("SELECT * FROM $wpdb->comments WHERE comment_post_ID = %d AND comment_author_url = %s", $comment_post_ID, $comment_author_url) );
-	if ( $dupe )
+	$dupe = $wpdb->get_results( $wpdb->prepare( "SELECT * FROM $wpdb->comments WHERE comment_post_ID = %d AND comment_author_url = %s", $comment_post_ID, $comment_author_url ) );
+	if ( $dupe ) {
 		trackback_response( 1, __( 'We already have a ping from that URL for this post.' ) );
+	}
 
-	$commentdata = compact('comment_post_ID', 'comment_author', 'comment_author_email', 'comment_author_url', 'comment_content', 'comment_type');
+	$commentdata = compact( 'comment_post_ID', 'comment_author', 'comment_author_email', 'comment_author_url', 'comment_content', 'comment_type' );
 
 	$result = wp_new_comment( $commentdata );