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@h1k3r
Created August 2, 2016 11:49
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Anonymize IP according like Google Analytics (according to German laws)
<?php
/**
* Last byte for IPv4 and last 80 bits for IPv6 are set to zero
* @see https://support.google.com/analytics/answer/2763052?hl=en
*/
function anonymizeIp($ip)
{
$binary = inet_pton($ip);
if ($binary === false) {
return false;
}
if (strlen($binary) === 16) {
$maskIp = inet_pton('ffff:ffff:ffff:0000:0000:0000:0000:0000');
} else {
$maskIp = inet_pton('255.255.255.0');
}
return inet_ntop($binary & $maskIp);
}
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