## PHP使用Redis對IP訪問頻次進行限制 ~~~ /** * time:2020-07-03 22:52 * blog: http://wml.vip/ * author：zhengbingdong */ $redis = new Redis(); $redis->connect('127.0.0.1', 6379); //連接 Redis if (!$redis->exists(get_real_ip())) { //第一次訪問 $redis->set(get_real_ip(), 1, 5 * 60); // 設置5分鐘過期時間并設置初始值1 } else { //已經記錄過IP if ($redis->get(get_real_ip()) < 30) { //判斷IP有沒有到達拉黑閾值 $redis->incr(get_real_ip()); //次數加一 } else { echo '此IP已拉黑,5分鐘內請求已達到：' . $redis->get(get_real_ip()) . '次'; } } function get_real_ip($type = 0, $adv = false) { $type = $type ? 1 : 0; static $ip = NULL; if ($ip !== NULL) return $ip[$type]; if ($adv) { if (isset($_SERVER['HTTP_X_FORWARDED_FOR'])) { $arr = explode(',', $_SERVER['HTTP_X_FORWARDED_FOR']); $pos = array_search('unknown', $arr); if (false !== $pos) unset($arr[$pos]); $ip = trim($arr[0]); } elseif (isset($_SERVER['HTTP_CLIENT_IP'])) { $ip = $_SERVER['HTTP_CLIENT_IP']; } elseif (isset($_SERVER['REMOTE_ADDR'])) { $ip = $_SERVER['REMOTE_ADDR']; } } elseif (isset($_SERVER['REMOTE_ADDR'])) { $ip = $_SERVER['REMOTE_ADDR']; } $long = sprintf("%u", ip2long($ip)); $ip = $long ? array($ip, $long) : array('0.0.0.0', 0); return $ip[$type]; } ~~~