php如何实现弹出新页面

<?php
echo "<script>alert('退出成功!');location.href='".$_SERVER["HTTP_REFERER"]."';</script>"; 
?>

echo '<meta http-equiv="Content-Type" content="text/html; charset=UTF-8" />';

/**
* 页面跳转方法
* @param $msg 提示说明
* @param null $path 跳转路径
* @param null $parent 为ture则返回父窗口
*/
function messageInfo($msg,$path=NULL,$parent=NULL){
  if($parent === true){
      $str="<script>alert('".$msg."');parent.location.href='".$path."‘</script>";
    }else if(empty($path)){
      $str="<script>alert('".$msg."');history.back()</script>";
    }else{
      $str="<script>alert('".$msg."');location.href='".$path."'</script>";
  }
  echo '<meta http-equiv="Content-Type" content="text/html; charset=UTF-8" />';//支持中文
  echo $str;
}

echo "<script> alert('no loginid'); </script>"; 
echo "<meta http-equiv='Refresh' content=0; URL=$url>";

header("Location:".PSYS_BASE_URL."user/index");

// echo "<script> alert('创建tag成功!'); </script>";
   // header("refresh:3;url='createTag' ");