- implode: documentation ( source)
- explode: documentation ( source)
<?php
function _floor($time) {
$elm = explode(':', $time);
$elm[1] -= $elm[1] % 15;
$elm[2] = '00';
return implode(':', $elm);
}
echo _floor('07:17:46') . PHP_EOL;
echo _floor('06:25:25') . PHP_EOL;