ansaurus

Question

How do I execute a PHP function in an onclick event?

Answer 1

+4 A:

Umm....PHP doesn't work this way. PHP is server-side. You cannot directly call PHP functions from an onclick hander. That only can call javascript (which is client-code) code. What you can do is call the PHP function via an AJAX GET call.

Rocket 2010-10-14 14:56:12

Ah. That makes sense. Thanks, Rocket!

lucifer 2010-10-14 15:08:12

Answer 2

+2 A:

You can load the PHP File over AJAX with JS

jQuery

$("#link").click(function(){
      $.ajax({
           url: "myphpfile.php"
      });
});

Fincha 2010-10-14 14:57:13

Perfect. I understand. Wow, I never thought jQuery was so easy. Thanks a billion!

lucifer 2010-10-14 15:02:54

:) glad to hear this

Fincha 2010-10-14 17:15:43

Answer 3

+1 A:

You can't call PHP functions from javascript directly. You can either use AJAX to call back to a PHP page that does what you want, like Rocket and Fincha have said or you can get PHP to output the javascript, and change it based on what the user sends to you.

To do the latter; in the PHP file you'll need a line like

<?php

header('Content-type: text/javascript');

?>

And that has to be BEFORE you output anything.

Then below that you generate the javascript, as you would any javascript file, but you can use server side data and include it in your file.

function AJavascriptFunction()
{
    alert(<?= $_GET['getvar'] ?>);
}

Then in your html or PHP page you can do

<a onclick="AJavascriptFunction();" href="javascript:void(0);">Do something</a>

I do not recommend this. Use AJAX

Matt Ellen 2010-10-14 15:08:36

Thanks! Yeah, I don't like the idea of using Javascript for this, probably for different reasons though. I will check out AJAX :)

lucifer 2010-10-14 16:24:36

ansaurus

tags:

views:

answers:

How do I execute a PHP function in an onclick event?

related questions