How to limit the IP address range in PHP

This article mainly introduces the method of limiting the IP address range in PHP. It involves the skills of operating IP addresses in PHP. It is of great practical value. Friends in need can refer to it.

The example in this article tells about the PHP limitation of IP address. range method. Share it with everyone for your reference. The details are as follows:

Only IP addresses within a limited range can access

function get_real_ipaddress() {
 if (!empty($_SERVER['HTTP_CLIENT_IP'])) {
  return $_SERVER['HTTP_CLIENT_IP'];
 } elseif (!empty($_SERVER['HTTP_X_FORWARDED_FOR'])) {
  return $_SERVER['HTTP_X_FORWARDED_FOR'];
 }
 return $_SERVER['REMOTE_ADDR'];
}
function in_ip_range($ip, $ip_one, $ip_two = false) {
 if(!$ip_two) {
  return $ip_one === $ip;
 }
 return ip2long($ip_one) * -1 >= ip2long($ip) * -1 && ip2long($ip_two) * -1 <= ip2long($ip) * -1;
}
function validate_ip() {
 $ip = explode(&#39;:&#39;, get_real_ipaddress());
 $ip = $ip[0];
 if(in_ip_range($ip, &#39;212.76.229.115&#39;, &#39;212.76.229.120&#39;)) {
  return true;
 } else if(in_ip_range($ip, &#39;194.78.4.66&#39;, &#39;194.78.4.79&#39;)) {
  return true;
 } else if(in_ip_range($ip, &#39;194.8.4.78&#39;, &#39;194.8.4.78&#39;)) {
  return true;
 } else if(in_ip_range($ip, &#39;0&#39;, &#39;1&#39;)) { // local
  return true;
 }
 header(&#39;Location: http://www.jb51.net&#39;);
}

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