- substr: documentation ( source)
- strpos: documentation ( source)
- gmdate: documentation ( source)
- number_format: documentation ( source)
<?php
$time = 55.01;
echo ' (' . ($time > 60 * 60 ? gmdate('H:', $time) : '') . gmdate('i:s', $time) . substr(number_format($time, 2), strpos(number_format($time, 2), '.')) . ' sec)' . "\n\n";