Prevent Too Many Request From a Client using PHP


In certain scenarios, we might need to make sure that a client is not allowed to request a page for multiple number of times within a period of time.

The following sample PHP code exits the execution when a client requests the same page more than once within 2 seconds. We can easily change the threshold value of 2 seconds as per our requirement.

This might prove to be pretty useful when the webpage is heavy and resourceful.

Full Source Code :

  margin:0 auto;
  if (!isset($_SESSION)) {
  if(@$_SESSION['last_request'] > time() - 2){
    echo '<div class="centered"><strong>TOO MANY REQUESTS</strong> <hr><p><em>You are allowed a request every 2 seconds.</em></p></div>';
  $_SESSION['last_request'] = time();
<div class="centered">
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Follow this video for complete guidance :

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