Validate date from format

dateFormatValidate.php

<?php
/**
 * @param string $dateIn
 * @param string $format
 * @return bool
 */
function dateFormatValidate($dateIn = '', $format = 'Y-m')
{
    try {

        $date = \DateTime::createFromFormat($format, $dateIn);

        if ($date->format($format) != $dateIn) {
            throw new \Exception('input date do not equal to your format');
        }

        return true;
    } catch (\Exception $e) {
        return false;
    }
}