php 获得当前的脚本网址和相对路径转化成绝对路径正则

function relative_to_absolute($content, $feed_url) { 
preg_match('/(http|https教程|ftp):///', $feed_url, $protocol); 
$server_url = preg_replace("/(http|https|ftp|news):///", "", $feed_url); 

$server_url = preg_replace("//.*/", "", $server_url); 
    if ($server_url == '') { 
        return $content; 
    } 
    if (isset($protocol[0])) { 
$new_content = preg_replace('/href="//', 'href="'.$protocol[0].$server_url.'/', $content); 
$new_content = preg_replace('/src="//', 'src="'.$protocol[0].$server_url.'/', $new_content); 
    } else { 
$new_content = $content; 
    } 
    return $new_content; 
} 
?>

//获得当前的脚本网址

function get_php_url(){
        if(!empty($_server["request_uri"])){

 

$scriptname = $_server["request_uri"];
$nowurl = $scriptname;
        }else{
$scriptname = $_server["php_self"]; //
                if(empty($_server["query_string"])) $nowurl = $scriptname;
                else $nowurl = $scriptname."?".$_server["query_string"];
        }

//

        return $nowurl;
}

?>