验证日期格式：yyyy-mm-ddphp基础

function checkDateFormat($date) {

// match the format of the date

if (preg_match("/^([0-9]{4})-([0-9]{2})-([0-9]{2})$/", $date, $parts)) {

// check whether the date is valid of not

if (checkdate($parts[2], $parts[3], $parts[1])) {

return true;

} else {

return false;

}

} else {

return false;

}

}