Code summary for disallow single IP and IP segment access in PHP _php tutorial

Prohibit single IP
Add IP Access Restrictions
if (getenv (' http_client_ip ') && strcasecmp (getenv (' http_client_ip '), ' unknown ') {
$userip = getenv (' http_client_ip ');
} elseif (getenv (' http_x_forwarded_for ') && strcasecmp (getenv (' http_x_forwarded_for '), ' unknown ') {
$userip = getenv (' http_x_forwarded_for ');
} elseif (getenv (' remote_addr ') && strcasecmp (getenv (' remote_addr '), ' unknown ') {
$userip = getenv (' remote_addr ');
} elseif (Isset ($_server[' remote_addr ") && $_server[' remote_addr '] && strcasecmp ($_server[' Remote_ ADDR '], ' unknown ') {
$userip = $_server[' remote_addr ');
}
$banned _ip = Array (
"127.0.0.1",
"203.0.0.1",
"56.12.50.65",
"192.168.1.88"
);
if (In_array ($userip, $banned _ip))
{
Die ("Your IP was block to connect!");
}
echo "Home test of the script";
?>
Block IP Segments
Copy CodeThe code is as follows:
Add IP Access Restrictions
if (getenv (' http_client_ip ') && strcasecmp (getenv (' http_client_ip '), ' unknown ') {
$userip = getenv (' http_client_ip ');
} elseif (getenv (' http_x_forwarded_for ') && strcasecmp (getenv (' http_x_forwarded_for '), ' unknown ') {
$userip = getenv (' http_x_forwarded_for ');
} elseif (getenv (' remote_addr ') && strcasecmp (getenv (' remote_addr '), ' unknown ') {
$userip = getenv (' remote_addr ');
} elseif (Isset ($_server[' remote_addr ") && $_server[' remote_addr '] && strcasecmp ($_server[' Remote_ ADDR '], ' unknown ') {
$userip = $_server[' remote_addr ');
}
$ban _range_low=ip2long ("217.0.0.0"); On the IP segment
$ban _range_up=ip2long ("217.255.255.255");//ip Duan Mei
$ip =ip2long ($userip]);
if ($ip > $ban _range_low && $ip < $ban _range_up)
{
print "banned";
Exit ();
}
?>

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