Question

53

Passing PHP variable into JavaScript

rated 0 times [ 59] [ 6] / answers: 1 / hits: 24017 / 14 Years ago, tue, march 15, 2011, 12:00:00

I've a PHP session variable, $_SESSION['user'], alive throughout the session. In the head section, I've my JavaScript file included, scripts.js.

How do I pass the session variable into the JavaScript file if I want something like the following.

$.(#btn').click (

     function() {

        alert('<?php echo $_SESSION['user']; ?>');

     }

)

As the <?php ?> isn't recognized in the JavaScript file, the code above doesn't work. So I've to put in the PHP file itself, but how do I keep it in the JavaScript file?

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estefanib

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answered 14 Years ago reina · Accepted Answer

In your PHP file you could set your user as a global varibale:

<script type=text/javascript>

    var ptamzzNamespace = {

       sessionUser : '<?php echo $_SESSION['user']; ?>'

    }        

</script>

Include this before including your external JavaScript code.

Then in your JavaScript file you can use it:

$.(#btn').click (

     function() {

        alert(ptamzzNamespace.sessionUser);

     }

)

Additionally:
If you're not sure if your session varibale can contain quotes itsself, you can use addslashes() to fix this problem:

<?php echo addslashes($_SESSION['user']); ?> even if this will maybe produce something you don't really want to display (because it produces a string with slashes) it will help that your code will not fail. (Thanks to Artefacto)

Would this be an option for you?