function validateGoogleBotIP($ip) {
$hostname = gethostbyaddr($ip); //”crawl-66-249-66-1.googlebot.com”

return preg_match(‘/\.google(bot)?\.com$/i’, $hostname);
}

if (strpos($_SERVER[‘HTTP_USER_AGENT’], ‘Google’) !== false) {
if (validateGoogleBotIP($_SERVER[‘REMOTE_ADDR’])) {
echo ‘It is ACTUALLY google’;
} else {
echo ‘Someone\’s faking it!’;
}
} else {
echo ‘Nothing to do with Google’;
}

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