Php methods for implementing cc AttacK Defense and examples of preventing Quick Page refreshing

Php methods for implementing cc AttacK Defense and examples of preventing Quick Page refreshing

This article mainly introduces how php implements cc AttacK Defense and How to Prevent Quick Page refreshing. For more information, see

 

The Code is as follows:

<? Php

// Directly exit the proxy IP Address

Empty ($ _ SERVER ['HTTP _ vean']) or exit ('Access Denied ');

// Prevents quick refresh

Session_start ();

$ Seconds = '3'; // time period [seconds]

$ Refresh = '5'; // Number of refreshes

// Set monitoring Variables

$ Cur_time = time ();

If (isset ($ _ SESSION ['last _ time']) {

$ _ SESSION ['refresh_times '] + = 1;

} Else {

$ _ SESSION ['refresh_times '] = 1;

$ _ SESSION ['last _ time'] = $ cur_time;

}

// Process Monitoring Results

If ($ cur_time-$ _ SESSION ['last _ time'] <$ seconds ){

If ($ _ SESSION ['refresh_times ']> = $ refresh ){

// Jump to the attacker's server address

Header (sprintf ('location: % s', 'HTTP: // 127.0.0.1 '));

Exit ('Access Denied ');

}

} Else {

$ _ SESSION ['refresh_times '] = 0;

$ _ SESSION ['last _ time'] = $ cur_time;

}

?>