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<?php function seconds_from_time($time) { list($h, $m, $s) = explode(':', $time); return ($h * 3600) + ($m * 60) + $s; } function time_from_seconds($seconds) { $h = floor($seconds / 3600); $m = floor(($seconds % 3600) / 60); $s = $seconds - ($h * 3600) - ($m * 60); return sprintf('%02d:%02d:%02d', $h, $m, $s); } echo seconds_from_time("18:27:31"); echo '<br />'; echo time_from_seconds(66451); ?>

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