discover_pingback_server_uri()
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.
Хуков нет.
Возвращает
Строку|false
. String containing URI on success, false on failure.
Использование
discover_pingback_server_uri( $url, $deprecated );
- $url(строка) (обязательный)
- URL to ping.
- $deprecated(строка)
- Not Used.
По умолчанию: ''
Список изменений
С версии 1.5.0 | Введена. |
Код discover_pingback_server_uri() discover pingback server uri WP 6.6.2
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( $url, array( 'timeout' => 2, 'httpversion' => '1.0', ) ); if ( is_wp_error( $response ) ) { return false; } $contents = wp_remote_retrieve_body( $response ); $pingback_link_offset_dquote = strpos( $contents, $pingback_str_dquote ); $pingback_link_offset_squote = strpos( $contents, $pingback_str_squote ); if ( $pingback_link_offset_dquote || $pingback_link_offset_squote ) { $quote = ( $pingback_link_offset_dquote ) ? '"' : '\''; $pingback_link_offset = ( '"' === $quote ) ? $pingback_link_offset_dquote : $pingback_link_offset_squote; $pingback_href_pos = strpos( $contents, 'href=', $pingback_link_offset ); $pingback_href_start = $pingback_href_pos + 6; $pingback_href_end = strpos( $contents, $quote, $pingback_href_start ); $pingback_server_url_len = $pingback_href_end - $pingback_href_start; $pingback_server_url = substr( $contents, $pingback_href_start, $pingback_server_url_len ); // We may find rel="pingback" but an incomplete pingback URL. if ( $pingback_server_url_len > 0 ) { // We got it! return $pingback_server_url; } } return false; }