php 跳转函数,与获取当前页面的URL地址

function url_this(){ 
        $url = "http://".$_server ["http_host"].$_server["request_uri"]; 
        $return_url = "<a href="//m.sbmmt.com/">; 
        return $return_url; 
    } 
 
//跳转函数 
function url_redirect($url,$delay=''){ 
 if($delay == ''){ 
  echo "<script>window.location.href="//m.sbmmt.com/">; 
 }else{//开源代码phpfensi.com 
  echo "<meta http-equiv='refresh' content='$delay;url=$url' />"; 
 } 
 
} 
 
} //end func