在同一页面上的PHP变量中获取HTML代码

Question

I am having a problem in using ob_get_clean function.I am putting a simplified version of the problem here. The html body is changed a little bit using javascript first and then mailed. Here is the file containing php and html code.

<?php
    ob_start();
?>
<h1 id="check" style="color:blue;">This is first comment</h1>
<script>
    document.getElementById("check").innerHTML = "This is second comment";
</script>
<?php
    $test = ob_get_clean();
    echo $test;
    $to = "[e-mail]";
    $subject = "Subject";
    $headers = "From: Sender
";
    $headers .= "Content-Type: text/html
";
    $message="";
    $message .= <<< EOF
    $test

    EOF;
    mail($to,$subject,$message,$headers);
?>

In the line echo $test, the html output of the page is

This is second comment

However the email received contains

This is first comment

I want that the email that is sent should be "This is second comment" that is the html code that has been changed using javascript. Any help would be appreciated.

Answer 1

No, the php part is done on the server.

The JS is done on the client side long after the php execution has ended.