Time.php

<?php

namespace My\Util;

define('MYSQL_ZERO_DATE', '0000-00-00');
define('MYSQL_ZERO_DATETIME', '0000-00-00 00:00:00');
define('MYSQL_ZERO_DATETIME_INT64', -62169962400); // This is clearly flawed since it is time-zone dependent.

class Time
{
    /**
     * Simple function to 'scrub' passed in time into a specific format.
     *
     * @param mixed $date
     * @param string $format
     * @param string $empty
     * @return string
     */
    public static function formatDate($date, $format = MYSQL_FORMAT_DATE, $empty = MYSQL_ZERO_DATE)
    {
        if ($date === MYSQL_ZERO_DATE
            || $date === MYSQL_ZERO_DATETIME
            || $date === MYSQL_ZERO_DATETIME_INT64
            || (empty($date) && $date !== 0)
        ) {
            return $empty;
        }

        $dt = new DateTime();

        try {
            if (is_integer($date)) {
                $dt->setTimestamp($date);
            } else {
                $dt->modify($date);
            }
        } catch (Exception $e) {
            return $empty;
        }

        $errors = DateTime::getLastErrors();

        if ($errors['warning_count'] + $errors['error_count'] > 0) {
            return $empty;
        }

        return $dt->format($format);
    }
}