Yii2 Rate Limiting Api

Question

I\'m worried about Yii2 Rate limiting api?

What is Rate limiting api, why this used?

Here are some methods from Yii2 Can a yii guru explain in simple words a

Answer 1

public function getRateLimit($request, $action) {
    $id = $action->getUniqueId();
    $limits = [
          'user/login' => [20,10],
          'article/index' => [100,10],
          .......
           'other' => [50,10]
    ];
   if(!array_key_existe($id,$limits)) $id = 'other';
    return $limits[$id];
}