解析Url，检查参数，然后再次构建：

$url = "http://localhost/sarkari/wp-login.php?action=logout&redirect_to=%2Fsarkari%2F&_wpnonce=b5e3b954df&redirect_to=http://localhost/sarkari/2017/06/01/new-sample-post/";

function trimUrlParams($url, array $params) 
{
 $parts = parse_url($url);
 parse_str($parts[\'query\'], $query);
 $newQuery = array();

 if (is_array($query) && sizeof($query) > 0 ) {
  foreach ($query as $variable=>$value) {
   if (in_array($variable, $params)) {
    $newQuery[$variable] = $value;
   }
  }
 }

 return $parts[\'scheme\']."://".$parts[\'host\'].$parts[\'path\']."?". http_build_query($newQuery);
}


$newUrl = trimUrlParams($url, array(\'action\', \'redirect_to\', \'_wpnonce\'));