Use PHP variable in javascript function within a Smarty template

Question

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>

I looked at the source code and the variable `{$var}` displays `Name` — Roku, Apr 30 '13 at 20:22
This question is not a duplicate. It should not have been closed as a duplicate. Everyone that voted for this question to be closed as a duplicate isn't paying much attention. — Brad, May 02 '14 at 12:55

Brad · Answer 1 · 2013-04-30T20:34:17.253

8

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().

edited Apr 30 '13 at 20:34

answered Apr 30 '13 at 20:20

Brad

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Looks better than my! ;) – hek2mgl Apr 30 '13 at 20:22

score 1 · Answer 2 · answered Apr 30 '13 at 20:18

1

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; ?>;

answered Apr 30 '13 at 20:18

hek2mgl

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may want to add `addslashes()` to that. – Get Off My Lawn Apr 30 '13 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 '13 at 20:21
`{$production}` displays `Name` Does that count as a string? – Roku Apr 30 '13 at 20:29
are you using a template engine? (smarty)? – hek2mgl Apr 30 '13 at 20:31
I would assume this as `{$producetion}` wouldn't output anything if it's just php (or even html) – hek2mgl Apr 30 '13 at 20:33
If I just type `{$production}` simply in html, it would display Name – Roku Apr 30 '13 at 20:35
Only if you are using a template engine like smarty – hek2mgl Apr 30 '13 at 20:36
Use `var php_var = {$production|json_encode nofilter}` like @Brad said. – hek2mgl Apr 30 '13 at 20:38
Yea, just tried it and nothing is displayed. – Roku Apr 30 '13 at 20:40
Since `{$production}` is html code, would htmlentities work? – Roku Apr 30 '13 at 20:42
no this doesn't matter as it is a string – hek2mgl Apr 30 '13 at 20:45

Use PHP variable in javascript function within a Smarty template

2 Answers2

For PHP

For Smarty