PHP转换ip地址

ip转换

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/**  * ip转换整型  * @param int|string|null $ip ip地址  * @return int|string|null  */ function my_ip2long($ip) {     $res = false;     if (filter_var($ip, FILTER_VALIDATE_IP, FILTER_FLAG_IPV4)) {         $res = sprintf('%u', ip2long($ip));     } else if (filter_var($ip, FILTER_VALIDATE_IP, FILTER_FLAG_IPV6)) {         $ip_n     = inet_pton($ip);         $bits     = 15;         $ipv6long = '';         while ($bits >= 0) {             $bin      = sprintf('%08b', (ord($ip_n[$bits])));             $ipv6long = $bin . $ipv6long;             $bits--;         }         $res = gmp_strval(gmp_init($ipv6long, 2), 10);     }     if ($res) {         return $res;     } else {         return 0;     } }   /**  * 整型转换ipv6  * @param null|int|string $ip ip地址  * @return string  */ function my_long2ip($ip) {     if (empty($ip)) {         return '';     }     $bin = gmp_strval(gmp_init($ip, 10), 2);     if (strlen($bin) < 128) {         $pad = 128 - strlen($bin);         for ($i = 1; $i <= $pad; $i++) {             $bin = '0' . $bin;         }     }     $bits = 0;     $ipv6 = '';     while ($bits <= 7) {         $bin_part = substr($bin, ($bits * 16), 16);         $ipv6     .= dechex(bindec($bin_part)) . ':';         $bits++;     }     $res = inet_ntop(inet_pton(substr($ipv6, 0, -1)));     if ($res) {         // ipv4一定包含3个.号         if (substr_count($res, '.') === 3) {             $res = str_replace(':', '', $res);         }         return $res;     } else {         return '0';     } }