PHP restricted IP segment access, prohibit IP submission form code sharing, IP form _php Tutorial

Restrict IP segment access in PHP, disable code Sharing for IP submission forms, IP forms

Add the following code to the page where you want to prohibit access or submit a form.

Note: Below is just an instance code that restricts IP to PHP, and if you intend to apply it to a CMS, modify it yourself.

<?php/plus IP access limit 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 ') && Amp STRCASECMP (getenv (' remote_addr '), ' unknown ') {$userip = getenv (' remote_addr ');} elseif (Isset ($_server[' Remote_ ADDR ']) && $_server[' remote_addr '] && strcasecmp ($_server[' remote_addr '), ' unknown ') {$userip = $_ server[' REMOTE_ADDR ']; }//Restrict IP if ($userip = = ' 192.168.1.88 ') {header ("location:http://t.qq.com/wb631992791");//is disabled and then jumps to the Weibo exit;}//Limit IP segment $ip _ arr = explode ('. ', $userip); #限制的ip段, suppose it is 192.168.*.* if (!) ( ($ip _arr[0] = = ' 192 ' && $ip _arr[1]== ' 168 '))) {Header ("location:http://t.qq.com/wb631992791");//is forbidden to jump to Weibo exit;} else{header ("location:http://afish.cnblogs.com");//normal IP direct access to the small fish Court home exit;}?> 

PHP code that restricts access to IP address segments

$userip = $_server[' remote_addr '); Get the User IP
$userips = Explode (".", $userip);//Cut the acquired IP into an array

if ($userips [0]<=195 && $userips [0]>=195] && ($userips [1]<=163 && $userips [1]>= 163) && ($userips [2]<=079 && $userips [2]>=072) && ($userips [3]<=255 && $ userips[3]>=000)) {
echo "Your IP does not match!";
Exit
}else{
echo "by verification!";
}
?>

That's what I thought.
Get the user's IP with "." Split array
Then use "." To separate the restricted IP. Split array

Then determine whether the user IP is within this IP fault (determine whether four elements are within this range)
......
Here is a blue ideal for your reference
——————————————————
Class ip{//Get customer IP Address
function Getipadr (&$ IP) {
$ ip1=getenv ("http_x_forwarded_for");
$ ip2=getenv ("http_client_ip");
$ ip3=getenv ("REMOTE_ADDR");
if ($ ip1&&$ ip1!= ' Unknow ')
$ ip=$ ip1;
else if ($ ip2&&$ ip2!= ' Unknow ')
$ ip=$ ip2;
else if ($ ip3&&$ ip3!= ' Unknow ')
$ ip=$ IP3;
Else
$ ip= ' 127.0.0.1 ';
}
}
function Get_netip ($ myip) {//Leave only the first three bits of the client IP address
$ temp=explode (".", $ myip);
$ netip.=$ temp[0];
$ netip.= ".";
$ netip.=$ temp[1];
$ netip.= ".";
$ netip.=$ temp[2];
return $ netip;
}
$ filename= "Test.ini"; Defining Action Files
$ ip_lib=file ($ filename); Reads the file data into the array
$ allow=0;
$ ip=new IP;
$ thisip= "";
$ IP-&GT;GETIPADR (&$ Thisip);
$ thenetip=get_netip ($ thisip);

For ($ i=0;$ I
if (Ereg ($ thenetip,$ ip_lib[$ i])) {
$ allow=1;
Break
}
}

if ($ allow==1 ...) the rest of the full text >>

Help full look at a bunch of PHP code, how to implement the Forbidden IP Display page content

if (In_array ($ip, $blacklist)) {//block IP Access in blacklist
Header (' http/1.0 403 Forbidden ');
echo "No access";
Exit
}

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