- var_dump: documentation ( source)
- date: documentation ( source)
- preg_split: documentation ( source)
- strtotime: documentation ( source)
<?php
$time_intervals = "00:00-23:59";
$time_to_check = "2014-05-08 23:58:00";
$time_intervals = preg_split('/[\;]+/', $time_intervals); //separates the intervals by ;
$time_valid = false;
$i = 0;
$time_to_check = strtotime(date('H:i', strtotime($time_to_check)));
foreach ($time_intervals as $time_interval):
$time = preg_split('/[\-]+/', $time_interval);
if (($time_to_check >= strtotime($time[0])) && ($time_to_check <= strtotime($time[1]))):
$time_valid = true;
endif;
endforeach;
var_dump($time_valid);
?>