- print_r: documentation ( source)
<?php
$now = new DateTime();
$now->setTime(10,00);
$punchIn = new DateTime(); // 10:55 am
$punchIn->setTime(11,00);
print_r( (((int)$now->diff($punchIn)->format('%H'))*60)+(int)$now->diff($punchIn)->format('%i') );
if ((int)$now->diff($punchIn)->format('%i') < 10) {
print_r( 'punchIn');
}