converting js variable to php [duplicate]

This question already has answers here: Closed 11 years ago.

Possible Duplicate:

javascript variable into php

Okay lets imagine I've a javascript variable "x"

<script>
var x="jsvar";
</script>

Now I want its value in php variable $y <?php $y; ?> How to do it.

Okay few people ar开发者_开发技巧e confused i wanted to know is it possible if yes then how ?? if this isn't possible then comment here i'll remove it.

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You have to pass it to your PHP script, either via AJAX or via a formular with a submit button.

var xhr = new XMLHttpRequest();
xhr.onreadystatechange = function(){}; // change
xhr.open("POST", "your-script.php");
xhr.send("x="+x);

And the PHP script can look like this:

<?php

$y = isset($_POST['x']) ? $_POST['x'] : '';
echo $y;

?>