Remove specified key from url question string

php_remove_query_string_key

function remove_url_key($key){
	$base_uri = $_SERVER['QUERY_STRING'];    
	$_new_uri = array();
	if(!isset($_GET[$key]))
	{
		$q_string = $base_uri;
	}else
	{
		foreach($_GET as $uri=>$val)
		{
			if ($uri != $key)
			{
				$_new_uri[$uri] = $val;
			}
		}
		$q_string = http_build_query($_new_uri);
	}
	return  $q_string;
}