详解PHP接口访问频率限制

/**
 * 检测用户接口访问频率

 */

function api_frequency_visits ($uid) {

    $key = "user:{$uid}:api:frequency";

    $redis = new Redis();

    $redis->connect('127.0.0.1');

    $data = $redis->hGetAll($key);

    //需要删除的key

    $del_key = [];

    //时间内访问的总次数

    $total = 0;

    //时间内最大访问次数

    $max_frequency = 10;

    //当前时间

    $now_time = time();

    //限制时间

    $limit_time = 60;

    foreach ($data as $time=>$count) {

        if ($time < $now_time - $limit_time) {

            $del_key[] = $time;

        } else {

            $total += $count;

        }

    }

    //存在需要删除的key

    if ($del_key) {

        $redis->hDel($key, ...$del_key);

    }

    if ($total >= $max_frequency) {

        return false;

    }

    return $redis->hIncrBy($key, $now_time, 1);

}

$uid = 1;

$result = api_frequency_visits($uid);

if (!$result) {

    echo  json_encode(['code'=>0, 'msg'=>'操作过于频繁', 'data'=>[]]);die;

}

echo  json_encode(['code'=>1, 'msg'=>'', 'data'=>[

    'uid'=>$uid,

    'other'=>rand()

]]);die;

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