-9999, 'message' => '']; const ERR_SMS_BLACKS = ['code' => 100001, 'message' => 'mobile is in blacks']; const ERR_SMS_SEND_FAIL = ['code' => 100002, 'message' => 'send error']; public static function undefined(string $message) { return ['code' => self::ERR_UNDEFINED, 'message' => $message]; } public static function setMessage(string $message, array $err) { return ['code' => $err['code'] ?? 0, 'message' => $message]; } public static function is(array $err): bool { return isset($err['code']) && $err['code'] != 0; } public static function compare(array $err, array $needle): bool { return isset($err['code']) && isset($needle['code']) && $err['code'] === $needle['code']; } }