<?php
function normalise_ip($address)
{
$address = trim(strtolower($address));
$ipv4Expr = '/^\[?(?:(?:(?:0{1,4}:){1,5}|:):?ffff:)?(\d{1,3})\.(\d{1,3})\.(\d{1,3})\.(\d{1,3})]?$/i';
$ipv6Expr = '/^\[?((?:[0-9a-f]{1,4}:?|::)+)]?$/i';
if (preg_match($ipv4Expr, $address, $matches)) { // IPv4 address
$num = 0;
for ($i = 1; $i <= 4; $i++) {
$octet = (int) $matches[$i];
if ($octet > 255) {
return false;
}
$num |= $octet << ((4 - $i) * 8);
}
return sprintf('00000000000000000000ffff%04x', $num);
} else if (preg_match($ipv6Expr, $address, $matches)) { // IPv6 address
$parts = explode(':', $matches[1]);
$numParts = count($parts);
if ($parts[0] === '') {
array_splice($parts, 0, 2, array_fill(0, 8 - ($numParts - 2), '0000'));
} else if ($parts[$numParts - 1] === '') {
array_splice($parts, $numParts - 2, 2, array_fill(0, 8 - ($numParts - 2), '0000'));
} else {
foreach ($parts as $i => $part) {
if ($part === '') {
array_splice($parts, $i, 1, array_fill(0, 8 - ($numParts - 1), '0000'));
}
}
}
foreach ($parts as &$part) {
$part = sprintf('%04s', $part);
}
return implode('', $parts);
} else { // invalid
return false;
}
}
echo normalise_ip('192.168.0.1') . "\n";
echo normalise_ip('::ffff:C0A8:0001') . "\n";
echo normalise_ip('::ffff:C0A8:1') . "\n";
echo normalise_ip('[::ffff:C0A8:0001]') . "\n";
echo normalise_ip('[::ffff:192.168.0.1]') . "\n";
echo normalise_ip('0:0:0:0:0:ffff:192.168.0.1') . "\n";
echo normalise_ip('[0:0:0:0:0:ffff:192.168.0.1]') . "\n";
- Output for 5.0.0 - 5.0.5, 5.1.0 - 5.1.6, 5.2.0 - 5.2.17, 5.3.0 - 5.3.29, 5.4.0 - 5.4.45, 5.5.0 - 5.5.38, 5.6.0 - 5.6.30, 7.0.0 - 7.0.20, 7.1.0 - 7.1.33, 7.2.6 - 7.2.33, 7.3.0 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.6
- 00000000000000000000ffffc0a80001
00000000000000000000ffffc0a80001
00000000000000000000ffffc0a80001
00000000000000000000ffffc0a80001
00000000000000000000ffffc0a80001
00000000000000000000ffffc0a80001
00000000000000000000ffffc0a80001
- Output for 4.4.2 - 4.4.9
- Parse error: syntax error, unexpected '&', expecting T_VARIABLE or '$' in /in/Qt34i on line 34
Process exited with code 255. - Output for 4.3.0 - 4.3.1, 4.3.5 - 4.3.11, 4.4.0 - 4.4.1
- Parse error: parse error, unexpected '&', expecting T_VARIABLE or '$' in /in/Qt34i on line 34
Process exited with code 255. - Output for 4.3.2 - 4.3.4
- Parse error: parse error, expecting `T_VARIABLE' or `'$'' in /in/Qt34i on line 34
Process exited with code 255.
preferences:
261.87 ms | 401 KiB | 399 Q