WordPress/wp-trackback.php

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PHP
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<?php
/**
* Handle Trackbacks and Pingbacks Sent to WordPress
*
* @since 0.71
*
* @package WordPress
* @subpackage Trackbacks
*/
if ( empty( $wp ) ) {
require_once __DIR__ . '/wp-load.php';
wp( array( 'tb' => '1' ) );
}
// 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 '0'. Accepts '0' or '1', true or false.
* @param string $error_message Error message if an error occurred. Default empty string.
*/
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>';
die();
} else {
echo '<?xml version="1.0" encoding="utf-8"?' . ">\n";
echo "<response>\n";
echo "<error>0</error>\n";
echo '</response>';
}
}
if ( ! isset( $_GET['tb_id'] ) || ! $_GET['tb_id'] ) {
$post_id = explode( '/', $_SERVER['REQUEST_URI'] );
$post_id = (int) $post_id[ count( $post_id ) - 1 ];
}
$trackback_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'] ) : '';
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' ) ) {
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 );
}
Docs: Revise comments using “we” in WordPress root directory files. This updates some inline comments to better match the guidelines and recommendations set forth in the make/core and make/docs handbooks: > In general, use second person in your documentation. Second person depicts a friendly tone, with a perfect focus on the reader. In addition to this, directly addressing the reader helps avoid passive voice; thereby preventing unwanted confusion. > ... > the word “we” should be avoided (...) unless its made very clear which group is speaking. Includes: * Replacing first-person usage of "we" with second person point of view. * Making small clarification adjustments where the voice is much too casual or lacks clear context, especially for non-native English speakers. References: * [https://make.wordpress.org/docs/style-guide/language-grammar/grammatical-person/ Style Guide: Grammatical person] * [https://make.wordpress.org/docs/handbook/documentation-team-handbook/handbooks-style-and-formatting-guide/ Handbooks & HelpHub Style and Formatting Guide] * [https://make.wordpress.org/core/handbook/best-practices/post-comment-guidelines/#style-and-substance Post & Comment Guidelines: Style and Substance] Follow-up to [2176], [3430], [4676], [6009], [7991], [12688], [12762], [26008], [28978], [44488], [44962], [51979], [53131], [53132], [53156], [53131], [54200]. Props ironprogrammer, costdev, jorbin, SergeyBiryukov. See #57052. Built from https://develop.svn.wordpress.org/trunk@54866 git-svn-id: http://core.svn.wordpress.org/trunk@54418 1a063a9b-81f0-0310-95a4-ce76da25c4cd
2022-11-23 16:43:13 +01:00
// 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]->ID;
}
if ( ! isset( $post_id ) || ! (int) $post_id ) {
trackback_response( 1, __( 'I really need an ID for this to work.' ) );
}
if ( empty( $title ) && empty( $trackback_url ) && empty( $blog_name ) ) {
// If it doesn't look like a trackback at all.
wp_redirect( get_permalink( $post_id ) );
exit;
}
if ( ! empty( $trackback_url ) && ! 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 Blog name.
*/
do_action( 'pre_trackback_post', $post_id, $trackback_url, $charset, $title, $excerpt, $blog_name );
header( 'Content-Type: text/xml; charset=' . get_option( 'blog_charset' ) );
if ( ! pings_open( $post_id ) ) {
trackback_response( 1, __( 'Sorry, trackbacks are closed for this item.' ) );
}
$title = wp_html_excerpt( $title, 250, '&#8230;' );
$excerpt = wp_html_excerpt( $excerpt, 252, '&#8230;' );
$comment_post_id = (int) $post_id;
$comment_author = $blog_name;
$comment_author_email = '';
$comment_author_url = $trackback_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 ) {
trackback_response( 1, __( 'There is already a ping from that URL for this post.' ) );
}
$commentdata = array(
'comment_post_ID' => $comment_post_id,
);
$commentdata += compact(
'comment_author',
'comment_author_email',
'comment_author_url',
'comment_content',
'comment_type'
);
$result = wp_new_comment( $commentdata );
if ( is_wp_error( $result ) ) {
trackback_response( 1, $result->get_error_message() );
}
$trackback_id = $wpdb->insert_id;
/**
* Fires after a trackback is added to a post.
*
* @since 1.2.0
*
* @param int $trackback_id Trackback ID.
*/
do_action( 'trackback_post', $trackback_id );
trackback_response( 0 );
}