Finds a pingback server URI based on the given URL.
Description
Checks the HTML for the rel="pingback" link and X-Pingback headers. It does a check for the X-Pingback headers first and returns that, if available.
The check for the rel="pingback" has more overhead than just the header.
Parameters
$url
stringrequired- URL to ping.
$deprecated
stringoptional- Not Used.
Default:
''
Source
* @param int $post_id Post ID.
* @param int $new The new comment count.
* @param int $old The old comment count.
*/
do_action( 'wp_update_comment_count', $post_id, $new, $old );
/** This action is documented in wp-includes/post.php */
do_action( "edit_post_{$post->post_type}", $post_id, $post );
/** This action is documented in wp-includes/post.php */
do_action( 'edit_post', $post_id, $post );
return true;
}
//
// Ping and trackback functions.
//
/**
* Finds a pingback server URI based on the given URL.
*
* Checks the HTML for the rel="pingback" link and X-Pingback headers. It does
* a check for the X-Pingback headers first and returns that, if available.
* The check for the rel="pingback" has more overhead than just the header.
*
* @since 1.5.0
*
* @param string $url URL to ping.
* @param string $deprecated Not Used.
* @return string|false String containing URI on success, false on failure.
*/
function discover_pingback_server_uri( $url, $deprecated = '' ) {
if ( ! empty( $deprecated ) ) {
_deprecated_argument( __FUNCTION__, '2.7.0' );
}
$pingback_str_dquote = 'rel="pingback"';
$pingback_str_squote = 'rel=\'pingback\'';
/** @todo Should use Filter Extension or custom preg_match instead. */
$parsed_url = parse_url( $url );
if ( ! isset( $parsed_url['host'] ) ) { // Not a URL. This should never happen.
return false;
}
// Do not search for a pingback server on our own uploads.
$uploads_dir = wp_get_upload_dir();
if ( str_starts_with( $url, $uploads_dir['baseurl'] ) ) {
return false;
}
$response = wp_safe_remote_head(
$url,
array(
'timeout' => 2,
'httpversion' => '1.0',
)
);
if ( is_wp_error( $response ) ) {
return false;
}
if ( wp_remote_retrieve_header( $response, 'X-Pingback' ) ) {
return wp_remote_retrieve_header( $response, 'X-Pingback' );
}
// Not an (x)html, sgml, or xml page, no use going further.
if ( preg_match( '#(image|audio|video|model)/#is', wp_remote_retrieve_header( $response, 'Content-Type' ) ) ) {
return false;
}
// Now do a GET since we're going to look in the HTML headers (and we're sure it's not a binary file).
$response = wp_safe_remote_get(
Changelog
Version | Description |
---|---|
1.5.0 | Introduced. |
User Contributed Notes
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