Question

This should be very easy, but I am not getting it. I wish to receive hours:minutes, and return hours:minutes:seconds in 00:00:00 format. The following falls way short. Recommendations on the best way to do this? Thank you

<?php
    function fixTime($t)
    {
        $a = explode(':', trim($t));
        return ((count($a)==2) && ($h=$a[0]) && ($m=$a[1]) && ($h>=0) && ($m>=0) && ($h<=23) && ($m<=59))?$h.':'.$m.':00':'00:00:00';
    }

    echo(fixTime('23:33').'<br />');
    echo(fixTime('05:00').'<br />');
    echo(fixTime('5:00').'<br />');
?>

Answer 1

The strtotime function will help you out here:

function fixTime($t) {
    return date('H:i:s', strtotime($t));
}

echo fixTime('23:33'); // 23:33:00
echo fixTime('05:00'); // 05:00:00
echo fixTime('5:00'); // 05:00:00

Also, see the date function for a list of formatting options available.

To validate such simple input, a regular expression might be helpful:

function fixTime($t) {
    if (!preg_match('/^([01][0-9]|2[0-3]|[0-9]):[0-5][0-9]$/', $t)) {
        return false;
    }
    return date('H:i:s', strtotime($t));
}

echo fixTime('23:33'); // 23:33:00
echo fixTime('33:33'); // false

if (fixTime('33:33') === false) {
    // invalid date supplied
}