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Possible Duplicate:
How can I use a JavaScript variable as a PHP variable?

I need to use javascipt variables in PHP, how can I do that?

eg: 

<script>
var abc = 'this is text';
</script>

How can I read variable abc in php?

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marked as duplicate by mario, vascowhite, Maerlyn, Jürgen Thelen, kapa Aug 11 '12 at 13:03

This question has been asked before and already has an answer. If those answers do not fully address your question, please ask a new question.
2  
you'll get an explanation over here –  Uttara Aug 11 '12 at 7:34
1  
It doesn't make sense--Javascript is interpreted client-side, while PHP is interpreted server side. –  imallett Aug 11 '12 at 7:34

4 Answers 4

up vote 2 down vote accepted

One way of doing it is to make use of a hidden text/input box.

<input type="text" style="display:none" id="hiddenVal" />

In the Javascript assign the variable to the input box.

<script>
function loadValues()
{
var abc = 'this is text';
document.getElementById("hiddenVal").value = abc;
//alert(document.getElementById("hiddenVal").value);
}
</script>

<body onload="loadValues();">

<form action="processing.php" method="post">
  <input type="text" style="display:none" id="hiddenVal" />
  <input type="submit" name="submit" id="submit" value="Submit" />
</form>
</body>

This is one method to allow you to use Javascript variable and post it to the backend. Alternatively if you want to display these values just remove the

style="display:none"

on the control.

Now after the post occurred one should be able to pick up the variable using processing.php

<?php
echo $_POST["hiddenVal"];
?>

Very dirty way of doing this but does the trick.

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up vote 3 down vote

I am not sure will this help you in anyway. But in this way you can use javascript in server side.

<script type="text/javascript">
var abc= 'this is text';
<?php $abc = "<script>document.write(abc)</script>"?>   
</script>
<?php echo $abc;?>
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up vote 2 down vote

You're going to want to try something with AJAX. jQuery has a nice AJAX library if doing it pure doesn't sound too appealing to you.

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up vote 0 down vote

The way its possible is:

redirect to a php script

or

an AJAX call to a PHP script

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