Online PHP editor | refs for e1vAn

<?php function timeToSeconds($time) { if (!preg_match('~([+-]?)(\d{2}):(\d{2})~', $time, $out)) { echo "failed to parse $time\n"; return 0; } else { return (($out[2] * 3600) + $out[3] * 60) * ($out[1] == '-' ? -1 : 1); } } function secondsToTime($seconds) { $sign = $seconds < 0 ? '-' : ''; $abs = abs($seconds); return $sign . str_pad(floor($abs / 3600), 2, '0', STR_PAD_LEFT) . ':' . str_pad(floor($abs / 60 % 60), 2, '0', STR_PAD_LEFT); } $times = ['-03:34', '+01:00']; $seconds = 0; foreach ($times as $time) { $seconds += timeToSeconds($time); } echo $seconds; echo "\n---\n"; echo secondsToTime($seconds); echo "\n===\n"; $times = ['10:00', '+20:00']; $seconds = 0; foreach ($times as $time) { $seconds += timeToSeconds($time); } echo $seconds; echo "\n---\n"; echo secondsToTime($seconds); echo "\n===\n"; $times = ['+04:43', '03:33', '-10:33']; $seconds = 0; foreach ($times as $time) { $seconds += timeToSeconds($time); } echo $seconds; echo "\n---\n"; echo secondsToTime($seconds);