Php code summary for prohibiting access from a single IP address and ip address segment

Disable a single IP Address
<? Php
// Add IP address 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 is block to connect! ");
}
Echo "script home test ";
?>
Disable IP segments Copy codeThe Code is as follows: <? Php
// Add IP address 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 address segment
$ Ban_range_up = ip2long ("217.00000000255"); // ip end
$ Ip = ip2long ($ userip]);
If ($ ip> $ ban_range_low & $ ip <$ ban_range_up)
{
Print "Banned ";
Exit ();
}
?>