"; $ip='247.193.197.127'; $long=ip2long($ip);//int(-138295937) var_dump($long); echo "
";$ip='247.193.197.127';$long2=sprintf("%u",ip2long($ip));var_dump($long2);      //string(10) "4156671359"  10位echo "
";var_dump(long2ip($long2));//string(15) "247.193.197.127"

 $ip='47.93.97.127';只要47变为三位数，转化为整数后就是10位，需要sprintf函数的转化，否则出现负数