- date_default_timezone_set: documentation ( source)
- date: documentation ( source)
- strtotime: documentation ( source)
<?php
date_default_timezone_set('UTC');
$expireDate = "September 20 2014 12:00:00";
if(date() > strtotime($expireDate)){
//require('expired.html');
print('expired');
}else{
//require('form.html');
print('form');
}