如何在嵌入式文件中使用php会话？

Question

I have a site https://one.com/go.php that (for example) contains :

session_start();
$_SESSION['id_ad'] = 123456;
header('Location: https://two.com/index.php');

and on https://two.com/index.php user click and go to https://three.com/index.php that contains :

<script type="text/javascript" src="https://one.com/2.php"></script>

and finally 2.php is:

 <?php
session_start();
header("Content-Type: application/javascript");
?>
alert("<?=$_SESSION['id_ad']?>");

can i access $_SESSION['id_ad'] in 2.php ? I tested only on firefox works.

////////EDIT//////

thank you to @Dimash to mention my mistake, but the main question still exists

Answer 1

It works, you just return javascript wrongly. Firefox for some reason works, but other browsers fails.

Here is working code:

<?php
session_start();
header("Content-Type: application/javascript");
?>
alert("<?=$_SESSION['id_ad']?>");

Please note, that code was tested.

expect javascript file, not php with tag, you need return reall js file, so you need add header content type, telling that it is js file + remove script tag, as it is not html but regular js file.