PHP getRelativeDate

/*
 * Return a relative date
 * Adapted from :
 *      http://blog.angechierchia.com/php-mysql/afficher-une-date-relative-en-php
 */
function getRelativeTime($time) {
        $timeDiff = time() - $time;

        if($timeDiff <= 0)
                return "moins d'une seconde";

        $timeDiff = abs($timeDiff);

        $times = array(
                31104000 => 'an{s}',       // 12 * 30 * 24 * 60 * 60 secondes
                2592000  => 'mois',        // 30 * 24 * 60 * 60 secondes
                604800   => 'semaine{s}',  // 7 * 24 * 60 * 60 secondes
                86400    => 'jour{s}',     // 24 * 60 * 60 secondes
                3600     => 'heure{s}',    // 60 * 60 secondes
                60       => 'minute{s}');

        $strTime = NULL;

        // Until that the rest can't being converted
        while($timeDiff >= 60) {
                foreach($times AS $seconds => $unit) {
                        $delta = floor($timeDiff / $seconds);

                        if($delta >= 1) {
                                $unit = str_replace('{s}', ($delta == 1 ? NULL : 's'), $unit);
                                $strTime .= "$delta $unit ";
                                $timeDiff -= $delta * $seconds;
                        }
                }
        }

        // If there is still seconds
        ($timeDiff > 0)
                && $strTime .= "et $timeDiff secondes";

        return trim($strTime);
}