PHP code for restricting IP segment access and forbidding IP address submission forms _ PHP Tutorial

Code used in PHP to restrict access to IP segments and prohibit IP address submission forms. We only need to add the following code in feedback. php to judge. Note: The following is only an example code for php ip address restriction. if you want to apply the code to CMS, you can modify it as long as you add the following code to feedback. php for determination.

Note: The following is only an example code for php ip address restriction. if you want to apply the code to CMS, modify it on your own. or if you are using DEDECMS, contact this site.

The code is as follows:

// 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 '];
}
// Restrict ip addresses
If ($ userip = '27. 37.188.128 '){
Header ("location: http:// SC .jb51.net"); // jump to the foot home site after being disabled
Exit;
}
// Restrict ip segments
$ Ip_arr = explode ('.', $ userip );
# The restricted ip segment, for example, 192. 168 .*.*
If (! ($ Ip_arr [0] = '000000' & $ ip_arr [1] = '000000 '))){
Header ("location: http:// SC .jb51.net"); // jump to the script home material station after being disabled
Exit;
} Else {
Header ("location: http://www.jb51.net"); // normal IP directly access the home page
Exit;
}
?>

Bytes. Note: The following is only an example code for php ip address restriction. if you want to apply the code to CMS, modify it on your own...