Php implements cc attack defense and prevents quick page refreshing. example _ PHP Tutorial

Php implements cc attack defense and prevents quick page refreshing. Copy the code as follows :? Php proxy IP directly exits empty ($ _ SERVER [HTTP_VIA]) orexit (AccessDenied); prevents fast refresh of session_start (); $ seconds3; time period [seconds] The code is as follows:

// 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;
}
?>

The http://www.bkjia.com/PHPjc/735243.htmlwww.bkjia.comtruehttp://www.bkjia.com/PHPjc/735243.htmlTechArticle code is as follows :? Php // The proxy IP directly exits empty ($ _ SERVER ['http _ VIA ']) or exit ('Access Denied'); // prevents fast refresh of session_start (); $ seconds = '3'; // time period [seconds]...