This function should work as expected

function Get_User_Ip() { $IP = false;  if (getenv('HTTP_CLIENT_IP'))  {   $IP = getenv('HTTP_CLIENT_IP');  } else if(getenv('HTTP_X_FORWARDED_FOR'))  { $IP = getenv('HTTP_X_FORWARDED_FOR'); }  else if(getenv('HTTP_X_FORWARDED'))   {  $IP = getenv('HTTP_X_FORWARDED');  } else if(getenv('HTTP_FORWARDED_FOR'))  { $IP = getenv('HTTP_FORWARDED_FOR');  } else if(getenv('HTTP_FORWARDED'))  {  $IP = getenv('HTTP_FORWARDED'); }  else if(getenv('REMOTE_ADDR')) {  $IP = getenv('REMOTE_ADDR'); }  //If HTTP_X_FORWARDED_FOR == server ip if((($IP) && ($IP == getenv('SERVER_ADDR')) && (getenv('REMOTE_ADDR')) || (!filter_var($IP, FILTER_VALIDATE_IP))))  { $IP = getenv('REMOTE_ADDR');  }  if($IP) {  if(!filter_var($IP, FILTER_VALIDATE_IP)) {   $IP = false;  } }  else  { $IP = false; } return $IP; } 

This function should work as expected

function get_user_ip() { // List of server variables that may contain the client's IP address $ip_sources = [ 'HTTP_CLIENT_IP', 'HTTP_X_FORWARDED_FOR', 'HTTP_X_FORWARDED', 'HTTP_FORWARDED_FOR',  'HTTP_FORWARDED', 'REMOTE_ADDR' ];  $ip = false; // Iterate over each source to find a valid IP address  foreach ($ip_sources as $source) { if (getenv($source)) { $ip = getenv($source);   // Break the loop if a valid IP is found if (filter_var($ip, FILTER_VALIDATE_IP)) { break; } } }  // Final validation: ensure the IP is not the server's IP if ($ip && ($ip == getenv('SERVER_ADDR') || !filter_var($ip, FILTER_VALIDATE_IP))) { $ip = false; }   return $ip; }