以下是我现在用于将 IP 地址从 DECIMAL(39,0) 格式转换为 DECIMAL(39,0) 格式的函数。它们被命名为inet_ptod,inet_dtop表示到十进制“和”十进制到表示”。它需要PHP中的IPv6和bcmath支持。
/**
* Convert an IP address from presentation to decimal(39,0) format suitable for storage in MySQL
*
* @param string $ip_address An IP address in IPv4, IPv6 or decimal notation
* @return string The IP address in decimal notation
*/
function inet_ptod($ip_address)
{
// IPv4 address
if (strpos($ip_address, ':') === false && strpos($ip_address, '.') !== false) {
$ip_address = '::' . $ip_address;
}
// IPv6 address
if (strpos($ip_address, ':') !== false) {
$network = inet_pton($ip_address);
$parts = unpack('N*', $network);
foreach ($parts as &$part) {
if ($part < 0) {
$part = bcadd((string) $part, '4294967296');
}
if (!is_string($part)) {
$part = (string) $part;
}
}
$decimal = $parts[4];
$decimal = bcadd($decimal, bcmul($parts[3], '4294967296'));
$decimal = bcadd($decimal, bcmul($parts[2], '18446744073709551616'));
$decimal = bcadd($decimal, bcmul($parts[1], '79228162514264337593543950336'));
return $decimal;
}
// Decimal address
return $ip_address;
}
/**
* Convert an IP address from decimal format to presentation format
*
* @param string $decimal An IP address in IPv4, IPv6 or decimal notation
* @return string The IP address in presentation format
*/
function inet_dtop($decimal)
{
// IPv4 or IPv6 format
if (strpos($decimal, ':') !== false || strpos($decimal, '.') !== false) {
return $decimal;
}
// Decimal format
$parts = array();
$parts[1] = bcdiv($decimal, '79228162514264337593543950336', 0);
$decimal = bcsub($decimal, bcmul($parts[1], '79228162514264337593543950336'));
$parts[2] = bcdiv($decimal, '18446744073709551616', 0);
$decimal = bcsub($decimal, bcmul($parts[2], '18446744073709551616'));
$parts[3] = bcdiv($decimal, '4294967296', 0);
$decimal = bcsub($decimal, bcmul($parts[3], '4294967296'));
$parts[4] = $decimal;
foreach ($parts as &$part) {
if (bccomp($part, '2147483647') == 1) {
$part = bcsub($part, '4294967296');
}
$part = (int) $part;
}
$network = pack('N4', $parts[1], $parts[2], $parts[3], $parts[4]);
$ip_address = inet_ntop($network);
// Turn IPv6 to IPv4 if it's IPv4
if (preg_match('/^::\d+.\d+.\d+.\d+$/', $ip_address)) {
return substr($ip_address, 2);
}
return $ip_address;
}