TimeCalc.php

<form action="timecalc.php" method="post">
<textarea name="timelist" cols=10 rows=10></textarea><br/>
<input type='submit'/>
</form>


<?php

if (!empty($_POST['timelist'])) {
        $lines = explode("\n",$_POST['timelist']);
        $fHrs = 0;
        foreach ($lines as $v) {
                $timeParts = explode(":",$v);
                $hrs = 0;
                $mins = 0;
                $secs = 0;

                if (count($timeParts) == 1) {
                        $secs = intval($timeParts[0]);
                } elseif (count($timeParts) == 2) {
                        $secs = intval($timeParts[1]);
                        $mins = intval($timeParts[0]);
                } elseif (count($timeParts) <= 3) {
                        $secs = intval($timeParts[2]);
                        $mins = intval($timeParts[1]);
                        $hrs = intval($timeParts[0]);
                }
                $fHrs += $secs/3600 + $mins/60 + $hrs;
        }
        $totalHrs = floor($fHrs);
        $fMins = 60*($fHrs - $totalHrs);
        $totalMins = floor($fMins);
        $fSecs = 60*($fMins - $totalMins);
        $totalSecs = floor($fSecs);
        echo "<h3>Racked up " . $totalHrs . ":" . $totalMins . ":" . $totalSecs . "!</h3>";
}

?>