calc age from date

gistfile1.php

/**
 * age calculations based on date
 *
 * @param date $birth_date date in format Y-m-d
 *
 * @return bool|int
 */
function age($birth_date)
{
	if (! preg_match('/\d{4}-\d{2}-\d{2}/', $birth_date)) {
		$result_age = FALSE;
	} else {
		$result_age = DateTime::createFromFormat('Y-m-d', $birth_date)
			->diff(new DateTime('now'))
			->y;
	}

	return $result_age;
}