有时我们写一些接口的时候，需要提供用户的 ip，而当我们又不想把真实的用户ip提交的时候，我们可以伪造一个 ip 提供给第三方接口。我们在 common.php 中定义一个 方法
~~~
/**
* 获取随机 ip
*/
function getIp(){
$ip_long = [
['607649792', '608174079'], //36.56.0.0-36.63.255.255
['1038614528', '1039007743'], //61.232.0.0-61.237.255.255
['1783627776', '1784676351'], //106.80.0.0-106.95.255.255
['2035023872', '2035154943'], //121.76.0.0-121.77.255.255
['2078801920', '2079064063'], //123.232.0.0-123.235.255.255
['-1950089216', '-1948778497'], //139.196.0.0-139.215.255.255
['-1425539072', '-1425014785'], //171.8.0.0-171.15.255.255
['-1236271104', '-1235419137'], //182.80.0.0-182.92.255.255
['-770113536', '-768606209'], //210.25.0.0-210.47.255.255
['-569376768', '-564133889'] //222.16.0.0-222.95.255.255
];
$rand_key = mt_rand(0, 9);
$ip = long2ip(mt_rand($ip_long[$rand_key][0], $ip_long[$rand_key][1]));
return $ip;
}
