- floor: documentation ( source)
- explode: documentation ( source)
<?php
function getTime($time)
{
list($hours, $minutes, $seconds) = explode(':', $time);
echo $minutes . ': ' . 60 - ((int) floor((60-$minutes) / 10) * 10) . "\n";
}
getTime('12:34:00');
getTime('12:19:00');
getTime('12:01:00');
getTime('12:46:00');
getTime('12:58:00');