- substr: documentation ( source)
- date: documentation ( source)
- strtotime: documentation ( source)
<?php
$tempInicioTime = substr('2017-01-01 08:00:00', 11, 5);
echo $tempInicioTime . "\n";
$tempInicioTime = strtotime($tempInicioTime);
echo date('d m Y',$tempInicioTime);
$tempFimTime = substr('2017-01-01 12:00:00', 11, 5);
$tempFimTime = strtotime($tempFimTime);