php uses $_ POST or $_ SESSION [] to pass parameters to the js function

In php programming, parameters can be passed to js functions using $_ POST, $_ SESSION [''], or echo statements for output

<?php 

echo "<script>test('$_POST[userid]');</script> ";

?>

The $_ POST [''] above also applies to $_ SESSION [''];

<?php

$para = "hello boby!";

echo $para; // www.ofstack.com

echo "<script> var para=\"$para\"; alert(para);</script>";

?>