获得当前的脚本网址

//获得当前的脚本网址 

function GetCurUrl(){ 
    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; 
}