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",'http://127.0.0.1')); exit; } }else{ $ll_times = 0; $_SESSION['ll_lasttime'] = $ll_nowtime; $_SESSION['ll_times'] = $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"
The above is the detailed content of What is the PHP anti-CC attack implementation code?. For more information, please follow other related articles on the PHP Chinese website!

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