How to get form checkbox info

[flashman]

Hello,

I need to get information abou one checkbox inside a HTML form. It is a option where the user check it or no, to subscribe into a newslist, and i do not know how to make the test if its checked or no in PHP.

I have trying to use JavaScript, just like the sample above, and its not working.

<SCRIPT language="JavaScript">
<!--
function IsChecked(){
if (document.Myform.checkboxname.checked) {
document.write("<?php session_register('Variable'); ?>");
}
else document.write("<?php session_unregister('Variable'); ?>");
}
// -->
</SCRIPT>

Then I set the onclick event for the input checkbox form (onClick="Ischecked();")

In the PHP script which this form is submited, i try the variable justa like that, but it´s not getting the result i want.

<?php
if (session_is_registered('Noticiario')) {
...
?>

Now, there is something easyest do do, just with PHP?

Thanks,

[dar-k]

I don't think somethign like this will work:
document.write("<?php session_unregister('Variable'); ?>")

document.write is Javascript, wich works on the client, meaning that the above PHP will never be seen by the server, and therefore will not be processed.

If u want to check wether the checkbox was checked u should tell PHP to check if it has been submitted at all.

Say u have a checkbox like this:
<input type="checkbox" name="mycheckbox" value="myvalue">

To check it's existence u can use this PHP code to see if the value exists:

if (isset($_POST['mycheckbox'])) {
--process the value--
}

U see, if the box isn't checked, the value will be non-existent for the PHP page that processes the form.

I think I made it too complicated...
I hope this helps a bit. 🙂

[flashman]

Thanks a lot friend. Is works pretty fine now.

I thought the "checked" atribute from the check box was important to do this, but now i get the idea.

Best Regards.

Fernando