How to ban access to a certain IP or IP address range in PHP

This article mainly introduces the method of prohibiting access to a certain IP or IP address range in PHP, involving the operation skills of server variables $_SERVER, files and strings. It has certain reference value. Friends in need can refer to it

The example in this article describes how PHP prohibits access to a certain IP or IP address range. The specific analysis is as follows:

Because I have not studied Apache and nginx in depth, I wrote a small program in PHP that can disable addresses
When using, just:

<?php include("banIP.php");?>

Disable a single ip as follows:

<?php 
//禁用ip地址 
$ip=$_SERVER["REMOTE_ADDR"]; 
$ban=file_get_contents("ban.dat"); 
if(stripos($ban,$ip)) 
{ 
  die("Your IP Address is:$ip,you&#39;re forbiden to view this page!");   
} 
echo "Your IP Address is:$ip,hello!"; 
?>

ban.dat file is as follows:

BEGIN: 
119.184.251.245 
127.0.0.1 
192.168.1.100

Disable ip segment As follows:

<?php 
//禁用ip地址 
$ip=$_SERVER["REMOTE_ADDR"]; 
while($ip[count($ip-1)]!=&#39;.&#39;)$ip=substr($ip,1, -1); //整理出ip段 
$ban=file_get_contents("ban.dat"); 
if(stripos($ban,$ip)) 
{ 
  die("U&#39;re forbiden to view this page!");   
} 
echo "Hello!"; 
?>

Summary: The above is the entire content of this article, I hope it will be helpful to everyone's study.

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