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ip2long与long2IP 分析
2022-07-07 10:36:00 【全栈程序员站长】
<?php
$ip='47.93.97.127';
$long=sprintf("%u",ip2long($ip));//string(9) "794648959" 9位
var_dump($long);
echo "<br>";
$ip='247.193.197.127';
$long=ip2long($ip);//int(-138295937)
var_dump($long);
echo "<br>";
$ip='247.193.197.127';
$long2=sprintf("%u",ip2long($ip));
var_dump($long2); //string(10) "4156671359" 10位
echo "<br>";
var_dump(long2ip($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
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