Online PHP editor | output for T2jeX

@ 2015-04-01T14:20:20Z

<?php

function ipv6_addr_in_subnet($addr, $subnet, $mask = null)
{
    $addrBin = @inet_pton($addr);
    if (!$addrBin) {
        throw new \InvalidArgumentException('Invalid IPv6 address: ' . $addr);
    }

    $cidr = 0;

    if (isset($mask)) {
        if (is_int($mask)) {
            $cidr = (int)$mask;
            if ($cidr < 0 || $cidr > 128) {
                throw new \InvalidArgumentException('Invalid IPv6 CIDR mask: ' . $mask);
            }
        } else {
            $maskBin = @inet_pton($mask);
            if (!$maskBin) {
                throw new \InvalidArgumentException('Invalid IPv6 mask: ' . $mask);
            }
        }

        $subnetAddr = $subnet;
    } else {
        $parts = explode('/', $subnet);
        $numParts = count($parts);

        if ($numParts === 1) {
            $maskBin = "\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff\xff";
        } else if ($numParts === 2) {
            $cidr = (int)$parts[1];
        } else {
            throw new \InvalidArgumentException('Invalid IPv6 subnet');
        }

        $subnetAddr = $parts[0];
    }

    if (!isset($maskBin)) {
        $blocks = (int)($cidr / 16);
        $maskBin = pack(
            'n*',
            ...array_fill(0, $blocks, 0xffff),
            ...array_pad([((2 ** (16 - ($cidr % 16))) - 1) ^ 0xffff], 8 - $blocks, 0)
        );
    }

    $subnetAddrBin = @inet_pton($subnetAddr);
    if (!$subnetAddrBin) {
        throw new \InvalidArgumentException('Invalid IPv6 address: ' . $subnetAddr);
    }

    return ($addrBin & $maskBin) === ($subnetAddrBin & $maskBin);
}

var_dump(ipv6_addr_in_subnet('2001::1', '2001::/16'));
var_dump(ipv6_addr_in_subnet('2001::1', '2000::/17'));
var_dump(ipv6_addr_in_subnet('2001::1', '2001::/15'));
var_dump(ipv6_addr_in_subnet('2001::1', '2001::/120'));

Output for 5.6.7 - 5.6.28, 7.0.0 - 7.0.20, 7.1.0 - 7.1.33, 7.2.0 - 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: bool(true) bool(false) bool(true) bool(true)
Output for 5.3.0 - 5.3.29, 5.4.0 - 5.4.45, 5.5.24 - 5.5.35: Parse error: syntax error, unexpected '.' in /in/T2jeX on line 45
Process exited with code 255.
Output for 5.1.0 - 5.1.6, 5.2.0 - 5.2.17: Warning: Unexpected character in input: '\' (ASCII=92) state=1 in /in/T2jeX on line 7 Warning: Unexpected character in input: '\' (ASCII=92) state=1 in /in/T2jeX on line 16 Warning: Unexpected character in input: '\' (ASCII=92) state=1 in /in/T2jeX on line 21 Warning: Unexpected character in input: '\' (ASCII=92) state=1 in /in/T2jeX on line 35 Parse error: syntax error, unexpected '.' in /in/T2jeX on line 45
Process exited with code 255.
Output for 5.0.0 - 5.0.5: Warning: Unexpected character in input: '\' (ASCII=92) state=1 in /in/T2jeX on line 7 Warning: Unexpected character in input: '\' (ASCII=92) state=1 in /in/T2jeX on line 16 Warning: Unexpected character in input: '\' (ASCII=92) state=1 in /in/T2jeX on line 21 Warning: Unexpected character in input: '\' (ASCII=92) state=1 in /in/T2jeX on line 35 Parse error: parse error, unexpected '.' in /in/T2jeX on line 45
Process exited with code 255.
Output for 4.4.2 - 4.4.9: Parse error: syntax error, unexpected T_NEW in /in/T2jeX on line 7
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 T_NEW in /in/T2jeX on line 7
Process exited with code 255.
Output for 4.3.2 - 4.3.4: Parse error: parse error in /in/T2jeX on line 7
Process exited with code 255.

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