你们在win下php版本可以成功吗？为啥我的是null，我的php是5.6.11，win10环境，
Notice: Uninitialized string offset: 0 in C:\Users\dell\Desktop\test\Ip2Region.class.php on line 231

Notice: Uninitialized string offset: 1 in C:\Users\dell\Desktop\test\Ip2Region.class.php on line 232

Notice: Uninitialized string offset: 2 in C:\Users\dell\Desktop\test\Ip2Region.class.php on line 233

Notice: Uninitialized string offset: 3 in C:\Users\dell\Desktop\test\Ip2Region.class.php on line 234
报了好几个越界