我没有'；无法获取请求的页面id url - I didn't get requested page id url

function getUrl() {
  $url  = @( $_SERVER["HTTPS"] != 'on' ) ? 'http://'.$_SERVER["SERVER_NAME"] :  'https://'.$_SERVER["SERVER_NAME"];
  $url .= ( $_SERVER["SERVER_PORT"] !== 80 ) ? ":".$_SERVER["SERVER_PORT"] : "";
  $url .= $_SERVER["REQUEST_URI"];
  return $url;
}
?>

if（$sessionUser==1||$sessionSeller==1|$sessionadmin==1）｛？>：*"onClick="validate_form（'form_comment'）"/>
"/>

"onClick="window.location.href='login.php？event=帐户&url='"'"/>

仍然显示geturl是这样的：/login.php？event=帐户&url=

如何获得/login.php这样的页面？event=帐户&url=205。。。。。或任何

<?php 
      $getUrl = $_GET['url']; 
      echo $getUrl;
?>