What is the PHP anti-CC attack implementation code?

The implementation code of PHP to prevent CC attacks is "if (session_is_registered('ll_lasttime')){$ll_lasttime = $_SESSION['ll_lasttime'];$ll_times =...}".

The operating environment of this article: Windows 7 system, PHP version 7.1, DELL G3 computer

What is the PHP anti-CC attack implementation code? ?

PHP anti-CC attack implementation code

The so-called CC attack is that the other party uses a program or some agents to continuously access your website, causing you to The website cannot handle it and is in a crashed state

At this time, your statistical system (may be Quantum, Baidu, etc.) will of course not be able to count. However, we can use some anti-attack software to achieve this, but the effect is sometimes not obvious.

Below I provide a piece of PHP code, which can have a certain anti-CC effect.

Main function: Refreshing the page more than 5 times within 3 seconds will point to the local http://127.0.0.1

The code is as follows:

$P_S_T = $t_array[0] + $t_array[1];
$timestamp = time();
session_start();
$ll_nowtime = $timestamp ;
if (session_is_registered('ll_lasttime')){
$ll_lasttime = $_SESSION['ll_lasttime'];
$ll_times = $_SESSION['ll_times'] + 1;
$_SESSION['ll_times'] = $ll_times;
}else{
$ll_lasttime = $ll_nowtime;
$ll_times = 1;
$_SESSION['ll_times'] = $ll_times;
$_SESSION['ll_lasttime'] = $ll_lasttime;
}
if (($ll_nowtime - $ll_lasttime)<3){
if ($ll_times>=5){
header(sprintf("Location: %s",&#39;http://127.0.0.1&#39;));
exit;
}
}else{
$ll_times = 0;
$_SESSION[&#39;ll_lasttime&#39;] = $ll_nowtime;
$_SESSION[&#39;ll_times&#39;] = $ll_times;
}

The following is the netizen’s Reply:

SESSION relies on COOKIE. What should I do if I block COOKIE?

TCP/IP -> apache -> php This process has consumed a lot of things. At this point, there are no more calculation operations and MYSQL connections.

Just these few lines of code , cannot solve the problem. At most, it is disabled for those operations where you press F5 to refresh the page in the browser.

Therefore, it is recommended that everyone install a firewall to prevent CC attacks on the server, so that the effect will be better.

Recommended learning: "PHP Video Tutorial"

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