Setting PHP variable to JavaScript code?

Question

I need to change the value of a PHP variable to JavaScript code.

The value of the PHP variable has to be something out of (JavaScript) localStorage.

So it is something like this.

$variable = localStorage.anameofalocalstorage; //The localstorage part is js

How can I do this?

Only JavaScript can read `localStorage`. So, if you want PHP to get the value, you need to send it from JavaScript; possibly via AJAX. — gen_Eric, Jul 05 '13 at 16:29
You'll need to get your variable to the erver through a get or post request, eventually in Ajax... no other way — Laurent S., Jul 05 '13 at 16:29
Possible duplicate: http://stackoverflow.com/questions/4298091/php-javascript-variable-help?rq=1 http://stackoverflow.com/questions/1917576/how-to-pass-javascript-variables-to-php http://stackoverflow.com/questions/9836748/pass-javascript-variable-into-php-code?rq=1 — pattyd, Jul 05 '13 at 16:31
@RocketHazmat Oh.. thanks, but i don't really know Ajax.. can you please give me the code for doing that ? — Evert De Spiegeleer, Jul 05 '13 at 16:32
If you need to use a value set via javascript in php, and I think you are running the js at the browser, and not something like nodejs at the server-side, you must send the value set at the client (via js) to the server, as php is not executed on the client side. Is this ehat you want? — Alexander Jardim, Jul 05 '13 at 16:33
@EvertDeSpiegeleer: There are lots of AJAX tutorials out there, have a look around :-) — gen_Eric, Jul 05 '13 at 16:33

score 0 · Answer 1 · answered Jul 05 '13 at 17:06

This is an example code using jquery for the ajax call.

<?php

$variable_that_should_be_set=isset($_GET['shoudBeSet'])?$_GET['shoudBeSet']:'notSet';

?>

<html>
    <head>
        <script src="http://code.jquery.com/jquery-1.10.1.min.js"></script>

    </head>
    <body>
        <div id="div1"><?php echo $variable_that_should_be_set;?></div>
        <a href="#" id="button">Click here to Set</a>
        <script>
            $("#button").click( function () {
                $.get("?shouldBeSet=this_is_set")   
            })
        </script>
    </body>
</html>

Setting PHP variable to JavaScript code?

1 Answers1