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In my HTML file, I'm using a string variable called {$var} which is passed from a PHP file. How could I use {$var} in a javascript function within the same html file? I would like to display this variable using the js function. This is what I have so far:

<span id="printHere"></span>
<script type="text/javascript">
    var php_var = {$production};
    $('#printHere').html(php_var);
</script>
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1  
you just need to echo it –  Dagon Apr 30 at 20:18
 
Just look at the page source –  zerkms Apr 30 at 20:18
 
I looked at the source code and the variable {$var} displays <span class="itemprop" itemprop="name">Name</span> –  Roku Apr 30 at 20:22

marked as duplicate by epascarello, hjpotter92, pilsetnieks, Reuben Mallaby, Anand May 1 at 10:41

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2 Answers

up vote 4 down vote

For PHP

You can echo out the variable directly into your JavaScript. Just be sure to json_encode() it so that data types and escaping are all done automatically.

var php_var = <?php echo json_encode($production) ?>;

For Smarty

If you are using Smarty for your templating engine, you want this instead:

var php_var = {$production|json_encode nofilter};

What this does is disable the HTML escaping of Smarty (with nofilter) and passes the value through json_encode().

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Looks better than my! ;) –  hek2mgl Apr 30 at 20:22
up vote 1 down vote

Make sure $production is set. If it is a (javascript) String then use:

var php_var = '<?php echo addslashes($production); ?>';

If it is a Number then use

var php_var = <?php echo $production; ?>;
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1  
may want to add addslashes() to that. –  Ryan Naddy Apr 30 at 20:20
1  
@RyanNaddy, That's only part of the problem. See my answer with JSON-encoding for the correct solution. –  Brad Apr 30 at 20:21
 
{$production} displays <span class="itemprop" itemprop="name">Name</span> Does that count as a string? –  Roku Apr 30 at 20:29
 
are you using a template engine? (smarty)? –  hek2mgl Apr 30 at 20:31
 
Not that I know of. –  Roku Apr 30 at 20:32
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