PHP prohibits access to an IP or IP address segment _php tips

This article describes the PHP ban on an IP or IP address section of the method of access to share for everyone to reference. The specific analysis is as follows:

Because I haven't studied Apache and Nginx, I've written a small program that can disable the address in PHP.
Only when used:

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

Can

Disable individual IP as follows:

<?php 
//Disable IP address 
$ip =$_server["REMOTE_ADDR"]; 
$ban =file_get_contents ("Ban.dat"); 
if (Stripos ($ban, $ip)) 
{ 
  die ("Your IP address is: $ip," re forbiden to view this page!);   
} 
echo "Your IP address is: $ip, hello!"; 
? >

Ban.dat files are as follows:

BEGIN: 
119.184.251.245 
127.0.0.1 

The IP segment is disabled as follows:

<?php 
//Disable IP address 
$ip =$_server["REMOTE_ADDR"]; 
while ($ip [count ($ip-1)]!= '. ') $ip =substr ($IP, 1,-1); Sorting out the IP segment 
$ban =file_get_contents ("Ban.dat"); 
if (Stripos ($ban, $ip)) 
{ 
  die ("U ' re forbiden to view this page!");   
} 
echo "hello!"; 
? >

I hope this article will help you with your PHP program design.