How do I embed PHP code in JavaScript

Question

How can we use PHP code in JavaScript?

Example code:

function jst()
{
    var i = 0;
    i = <?php echo 35; ?>
    alert(i);
}

Anyone can help me out?

Answer 1

Hello @kartik,

If you have individual .js files, and you don't want PHP to process them (for example, for caching reasons), then you can just pass variables around in JavaScript.

For example, in your index.php (or wherever you specify your layout), you'd do something like this:

<script type="text/javascript">
    var my_var = <?php echo json_encode($my_var); ?>;
</script>

You could then use my_var in your JavaScript files.

This method also lets you pass other than just simple integer values, as json_encode() also deals with arrays, strings, etc. Correctly, serializing them into a format that JavaScript can use

Hope it helps!!

Thank you!!