Populate Php Session Variable When User Clicks A Checkbox In Form

[MockY]

In a regular form, how would I go about to populate a php session variable with the value of the checkbox the user checked, all without reloading the page?

I don't need to error check or anything for this, as I do that once the user submits the form. I just want to add a value to an existing session variable as soon as the user check the box.

 

Any help is greatly appreciated.

[Jessica]

AJAX.

[MockY]

I know AJAX is the way to go, hence me posting here and not elsewhere. However, I need some guidance to how to proceed with this as I find it far from straight forward.

[ManiacDan]

If you don't know anything about ajax, we can't teach you from the ground up.

 

The basic idea is that the request object allows javascript to call a URL and retrieve some formatted data, then parse that data and perform relevant actions.

 

You'll need to write a page that accepts a value (maybe a cookie) and returns the relevant data you're wanting as a bare string.

 

Then look up how to do an AJAX GET request using jquery (or by hand).

 

Have the ajax request hit the page you wrote, then move on from there.

[Jessica]

jQuery. 

 

You're not asking a very specific question, so you're not going to get a very specific answer.

[codefossa]

Have a PHP page that will set it, or part of a page and just use a GET variable then call jQuery's $.load function to it and you should be set.

[smoseley]

AJAX.

Helpful...

 

If you don't know anything about ajax, we can't teach you from the ground up.

Why not? It's not a complicated thing he's asking for, and AJAX is a pretty simple concept...

 

Your html page (requires jQuery):

<input type="checkbox" id="checkbox_id" />
<script type="text/javascript">
$('#checkbox_id').change(function(box) {
   $.ajax('/update_session.php?checked=' + (box.attr('checked') ? 1 : 0) );
});
</script>

 

update_session.php

 

session_start();
$_SESSION['box_checked'] = $_GET['checked'] ? 1 : 0;

Edited October 31, 2012 by smoseley