- time: documentation ( source)
- print_r: documentation ( source)
- gmdate: documentation ( source)
<?php
echo ("Expires: ".gmdate("D, d M Y H:i:s", time() + 3600)." GMT");
echo "\n";
$d1=new DateTime("2012-07-08 11:14:15.638276");
$d2=new DateTime("2012-07-08 11:14:15.889342");
$diff=$d2->diff($d1);
print_r( $diff ) ;