Pass php variables to external javascript

Question

How can I pass the php variables into an external javascript file? I found a lot of questions regarding this but I can't figure it out anyhow.

In the HTML file I have this link

<script type="text/javascript" src="myscript.php"></script>

This is the myscript.php file that I have been trying to output as a javascript file:

<?
Header("content-type: text/javascript");
?>

$(document).ready(function() {

$("#validate_form").validate({
    rules: {
        page_title: "required",
        seo_url: "required"
    },

    messages: {
        page_title: "<?=$page_title?>",
        seo_url: "<?=$seo_url?>"
    }
 }); 
});

score 2 · Answer 1 · answered Feb 13 '13 at 23:51

2

Append them using a query string:

<script type="text/javascript" src="myscript.php?page_title=whatever&seo_url=whatever"></script>

<?
Header("content-type: text/javascript");
?>

$(document).ready(function() {

$("#validate_form").validate({
    rules: {
        page_title: "required",
        seo_url: "required"
    },

    messages: {
        page_title: "<?=$_GET['page_title'];?>",
        seo_url: "<?=$_GET['seo_url'];?>"
    }
 }); 
});

answered Feb 13 '13 at 23:51

John Conde

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2

You might want to do some escaping before you insert those `$_GET` values in the JavaScript code though. `json_encode` should do. – Mattias Buelens Feb 13 '13 at 23:54
This is just a part of the javascript and I think it's a total of 20 different php variables in script. Is there another way, like making the variable global or something? – perqedelius Feb 13 '13 at 23:56
You can also have the PHP file include another file with variables in them. Al of the regular rules of PHP apply. – John Conde Feb 13 '13 at 23:57
+1 to using `json_encode`. Especially if using query-string parameters (since that's user-input). This method wouldn't properly escape. – Colin M Feb 14 '13 at 00:07
It worked to include a php file with variables. I'm not good at javascript so I don't know how to use json_encode. Can someone right a simple example code? – perqedelius Feb 14 '13 at 00:50

Pass php variables to external javascript

1 Answers1