没搞懂$ip_num2 = $ip_num_arr[2];意义

[nenge123]

echo '<br>test2:'.var_export(myapp\ip::get('127.0.0.1'));
echo '<br>test2:'.var_export(myapp\ip::get('183.38.211.40'));
//array ( 'start' => '::', 'end' => '64:ff9a:ffff:ffff::', 'addr' => array ( 0 => 'IANA保留地址', 1 => '', ), 'disp' => 'IANA保留地址 ', )

[nenge123]

好像里面并不包含IPV4