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PHP inside of JQuery

Posted on 2014-02-25
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Last Modified: 2014-02-26
How do I place PHP inside of JQuery?

I have the following:
$(document).ready(function() {
	$('input[type="radio"]').click(function() {
		if ($(this).attr("value") == "custom yes") {
			$("#custom-hidden-<?php echo $id; ?>").show('slow');
		}
		if ($(this).attr("value") == "custom no") {
			$("#custom-hidden").hide('fast');
		}
	});

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I need to know how to write the <?php echo $id; ?> Part.
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Question by:rgranlund
8 Comments
 
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Expert Comment

by:Scott Fell, EE MVE
ID: 39887391
You would not put your php inside of jquery, but you could wrap the entire piece of code around php where you echo the entire thing.
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Expert Comment

by:käµfm³d 👽
ID: 39887394
Does what you posted not work?
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Accepted Solution

by:
Gary earned 2000 total points
ID: 39887402
Nothing wrong with the way you have it but that javascript must be in your php page, you cannot have it in an external js file.
For things like this I tend to drop an hidden text field in the php page and call that field from the js file so I can keep everything separate.
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Expert Comment

by:Ray Paseur
ID: 39887438
Differences between client and server applications are explained in this article.
http://www.experts-exchange.com/Web_Development/Web_Languages-Standards/A_11271-Understanding-Client-Server-Protocols-and-Web-Applications.html

Basically, PHP runs on the server and generates the HTML document (including CSS and JavaScript such as jQuery).  After PHP has generated the document it sends the document to the client and goes back to sleep to await the next request.  The next request may come from a human mouse-click or from a jQuery method, but whatever PHP sent in its initial HTML document is what the browser has to work with unless and until another request is made.
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Expert Comment

by:Dave Baldwin
ID: 39887464
On one of my own pages, I have a javascript link that is actually a PHP page that generates the javascript.  The javascript link is:
<script type="text/javascript" src="ip.php"></script>

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And the PHP page is:
<?php 
//"ip.php" example- display user IP address on any page
Header("content-type: application/x-javascript");
$remoteIP=$_SERVER['REMOTE_ADDR'];
echo "document.write(\"<div><b>Your IP address is: " . $remoteIP . "</b></div>\")";
?>

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Expert Comment

by:Marco Gasi
ID: 39887607
I know another way to do that if you have your javascript in an external file:

in the head section of your page you can write:

<script>var id = <?=$id ?></script>
<script type='tex/javascript' src='your_script.js'></script>

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Then in your script you simply use the javascript variable id:

$(document).ready(function() {
	$('input[type="radio"]').click(function() {
		if ($(this).attr("value") == "custom yes") {
			$("#custom-hidden-"+id).show('slow');
		}
		if ($(this).attr("value") == "custom no") {
			$("#custom-hidden").hide('fast');
		}
	});
                                  

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It works fine but I'm not sure if this is a good practice...
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Expert Comment

by:Dave Baldwin
ID: 39887717
I like that too, I'll probably use that somewhere.
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Expert Comment

by:Ray Paseur
ID: 39887718
@marqusG: I don't see anything wrong at all -- it makes perfect sense to me.  I point out the client/server difference because sometimes there is confusion about what happens first and next, what happens on the server then on the client.  Both your example and Dave's example seem quite feasible.  At least that's the way I see it.

Best to all, ~Ray
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