How to ban ip from accessing website in php

php method to ban IP access to the website: first create a PHP sample file; then use "$ban_range_low" and "$ban_range_up" to ban a certain IP segment; finally output the IP access results.

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Example of PHP banning IP or IP address segment access

Example 1:

<? 
//禁止某个IP
$banned_ip = array (
"127.0.0.1",
"192.168.1.4"
);
if ( in_array( getenv("REMOTE_ADDR"), $banned_ip ) )
{
die ("您的IP禁止访问！");
}
//禁止某个IP段
$ban_range_low=ip2long("119.6.20.65");//IP段开始
$ban_range_up=ip2long("119.6.20.67");//IP段结束
$ip=ip2long($_SERVER["REMOTE_ADDR"]);
if ($ip>=$ban_range_low && $ip=<$ban_range_up)
{
echo "您的IP在被禁止的IP段之中，禁止访问！";
exit();
}
Echo “恭喜您的网络没有被屏蔽！”;
?>

Example 2:

Get restricted IP access records through text.

First create a given document such as blockip.txt

The content of the document is as follows (the specific blocked IP shall be modified in the following format):

BEGIN:
127.0.0.1
192.168.1.100

Prohibit single IP access:

<?php 
$ip=$_SERVER["REMOTE_ADDR"];
$ban=file_get_contents("blockip.txt");
if(stripos($ban,$ip))
{
  die("您的IP禁止访问！");  
}
echo "恭喜您的网络没有被屏蔽！";
?>

Block IP segment access:

<?php
$ip=$_SERVER["REMOTE_ADDR"];
while($ip[count($ip-1)]!=&#39;.&#39;)$ip=substr($ip,1, -1); //整理出ip段
$ban=file_get_contents("blockip.txt ");
if(stripos($ban,$ip))
{
  die("您的IP在被禁止的IP段之中，禁止访问！");  
}
echo "恭喜您的网络没有被屏蔽！";
?>

Note: You can add a page that restricts IP programs, such as blockip.php, and then use the include statement to reference the program code page in the relevant pages that need to restrict IP.

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