Check box conditionals

[phpwhile]

Combining XHTML with PHP, I would like to create a conditional that runs only when a check box is checked off.

For instance, the pseudocode:

IF checkBox = checked THEN
    statement(s)
END-IF 

Any pointers on how to perform a conditional in PHP that relies on an XHTML check box being checked off?

Thanks in advance.

[rikmoncur]

A checkbox only sends data if it's checked.
If you have a check box called 'fred' then:

<?php 
if(isset($_POST['fred']))
{echo "hello";}
?>