How to ban single ip access in php

php method to prohibit single ip access: first create a PHP sample file; then obtain the ip address through "$_SERVER["REMOTE_ADDR"];; finally pass "if(stripos($ban,$ip )){...}" method to prohibit single IP access.

The operating environment of this article: Windows 7 system, PHP version 7.1, DELL G3 computer

php bans a certain ip or ip address segment Access method

The example in this article describes the method of prohibiting access to a certain IP or IP address range in PHP. I share it with you for your reference. The specific analysis is as follows:

Because I have not studied Apache and nginx in depth, I used PHP to write a small program that can disable addresses.

When using it, 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 an 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!"; 
?>

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