原生php如何获取当前页面的url

原生php如何获取当前页面的url？

//php获取当前访问的完整url地址 
function get_current_url(){ 
    $current_url='http://'; 
    if(isset($_SERVER['HTTPS'])&&$_SERVER['HTTPS']=='on'){ 
        $current_url='https://'; 
    } 
    if($_SERVER['SERVER_PORT']!='80'){ 
        $current_url.=$_SERVER['SERVER_NAME'].':'.$_SERVER['SERVER_PORT'].$_SERVER['REQUEST_URI']; 
    }else{ 
        $current_url.=$_SERVER['SERVER_NAME'].$_SERVER['REQUEST_URI']; 
    } 
    return $current_url; 
}

方法二：

$url  =  $_SERVER['REQUEST_URI'].(strpos($_SERVER['REQUEST_URI'],'?')?'':"?");   
    $parse = parse_url($url);
    if(isset($parse['query'])) {
            parse_str($parse['query'],$params);
            $url   =  $parse['path'].'?'.http_build_query($params);
    }