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Pass a PHP string to a Javascript variable (including escaping newlines)
Access a JavaScript variable from PHP

I have a Javascript function that takes in one variable. The function has some php code inside it. I want to use this variable inside the php section of the function. I couldn't get it to work. How is it done?

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No-can-do, boss, at least not the way I think you're thinking :-) The PHP is being interpreted on the server before it's sent to the client. You can use PHP to populate a javascript variable directly, but going the other direction requires some kind of AJAX post. – rjz Mar 5 '12 at 5:56
this type of question is all over the web, please google it first – t q Mar 5 '12 at 5:58
you want JS inside php or php inside JS ? – Sam Arul Raj Mar 5 '12 at 6:21

marked as duplicate by Amber, roXon, casperOne♦ Mar 6 '12 at 19:55

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3 Answers

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The issue is that your PHP code is being rendered on the server before being served to the client. I would recommend either converting the PHP code into Javascript code or creating an AJAX call to the PHP function.

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Start reading about AJAX! You will likely need to rewrite some of the code you have written but what you are attempting to accomplish is not really possible otherwise.

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How easy is it to do with AJAX? – node ninja Mar 6 '12 at 20:49
It is simple once you get used to it, you will definitely need to do some reading and learning but it is fairly simplistic once you have done it a few times. – Ryan Kempt Mar 6 '12 at 21:01
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try with it

<script>
    var whatever = "<?php echo $phpVar ?>";
</script>
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this way is not correct – Sam Arul Raj Mar 5 '12 at 6:17

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