清理空格或回车分隔用于发送引用的URL。
原型
sanitize_trackback_urls( string $to_ping )
参数
$to_ping
(string)
(Required)
空格或回车符分隔URL
返回值
(string)
以http或https协议开头的URL,以回车符分隔。
源文件
路径:wp-includes/formatting.php
<?php
...
function sanitize_trackback_urls( $to_ping ) {
$urls_to_ping = preg_split( '/[rnt ]/', trim( $to_ping ), -1, PREG_SPLIT_NO_EMPTY );
foreach ( $urls_to_ping as $k => $url ) {
if ( !preg_match( '#^https?://.#i', $url ) )
unset( $urls_to_ping[$k] );
}
$urls_to_ping = array_map( 'esc_url_raw', $urls_to_ping );
$urls_to_ping = implode( "n", $urls_to_ping );
/**
* Filters a list of trackback URLs following sanitization.
*
* The string returned here consists of a space or carriage return-delimited list
* of trackback URLs.
*
* @since 3.4.0
*
* @param string $urls_to_ping Sanitized space or carriage return separated URLs.
* @param string $to_ping Space or carriage return separated URLs before sanitization.
*/
return apply_filters( 'sanitize_trackback_urls', $urls_to_ping, $to_ping );
}
...
?>
其他
英文文档:https://developer.wordpress.org/reference/functions/sanitize_trackback_urls/