Функция определения реального IP

function real_ip() { if( $_SERVER['HTTP_X_FORWARDED_FOR'] != '' ) { $client_ip = ( !empty($_SERVER['REMOTE_ADDR']) ) ? $_SERVER['REMOTE_ADDR'] : ( ( !empty($_ENV['REMOTE_ADDR']) ) ? $_ENV['REMOTE_ADDR'] : "unknown" ); $entries = split('[, ]', $_SERVER['HTTP_X_FORWARDED_FOR']); reset($entries); while (list(, $entry) = each($entries)) { $entry = trim($entry); if ( preg_match("/^([0-9]+\.[0-9]+\.[0-9]+\.[0-9]+)/", $entry, $ip_list) ) { $private_ip = array( '/^0\./', '/^127\.0\.0\.1/', '/^192\.168\..*/', '/^172\.((1[6-9])|(2[0-9])|(3[0-1]))\..*/', '/^10\..*/'); $found_ip = preg_replace($private_ip, $client_ip, $ip_list[1]); if ($client_ip != $found_ip) { $client_ip = $found_ip; break; } } } } else { $client_ip = ( !empty($_SERVER['REMOTE_ADDR']) ) ? $_SERVER['REMOTE_ADDR'] : ( ( !empty($_ENV['REMOTE_ADDR']) ) ? $_ENV['REMOTE_ADDR'] : "unknown" ); } return $client_ip; }