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| Title : |
Blacklist IPs - Simple way to blacklist IP's, good for instance when you want to stop certain IP ranges known to be spammers.
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| Categories : |
PHP, Security |
Alix Axel |
| Date : |
Apr 28th 2009 |
| Grade : |
1 of 5 (graded 1 times) |
| Viewed : |
1549 |
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| Search : |
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| Action : |
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| Tools : |
My Examples List |
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<?php
function IP_Blacklist($minimum = null, $maximum = null)
{
$ip = ip2long($_SERVER['REMOTE_ADDR']);
if (is_null($minimum) === false)
{
$minimum = explode('.', $minimum);
foreach ($minimum as $key => $value)
{
$minimum[$key] = ($value == '*') ? 0 : $value;
}
$minimum = ip2long(implode('.', $minimum));
if ($ip >= $minimum)
{
return false;
}
}
if (is_null($maximum) === false)
{
$maximum = explode('.', $maximum);
foreach ($maximum as $key => $value)
{
$maximum[$key] = ($value == '*') ? 255 : $value;
}
$maximum = ip2long(implode('.', $maximum));
if ($ip <= $maximum)
{
return false;
}
}
return true;
}
?> | |
Usage $_SERVER['REMOTE_ADDR'] = 195.22.23.24:
| <?php
IP_Blacklist('195.22.23.*'); // false, blacklisted
IP_Blacklist('195.0.0.0', '195.255.255.255'); // false, blacklisted
IP_Blacklist('195.22.23.25', '195.22.23.255'); // true, clean
if (IP_Blacklist('195.22.23.*', '195.22.23.*') === false)
{
die('Nice try spammer.');
}
?> | |
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