php防cc攻击

$P_S_T聽聽=聽$t_array[0]聽+聽$t_array[1];聽聽

$timestamp聽=聽time();聽session_start();聽聽$ll_nowtime聽=聽$timestamp聽;聽聽

if聽(session_is_registered('ll_lasttime')){聽聽

$ll_lasttime聽=聽$_SESSION['ll_lasttime'];聽聽

$ll_times聽=聽$_SESSION['ll_times']聽+聽1;聽聽

$_SESSION['ll_times']聽=聽$ll_times;聽聽

}else{聽聽$ll_lasttime聽=聽$ll_nowtime;聽聽$ll_times聽=聽1;聽聽

$_SESSION['ll_times']聽=聽$ll_times;聽聽

$_SESSION['ll_lasttime']聽=聽$ll_lasttime;聽聽

}聽聽if聽(($ll_nowtime聽-聽$ll_lasttime)<3){聽聽if聽($ll_times>=5){聽聽

聽聽header(sprintf("Location:聽%s",'http://127.0.0.1'));聽聽

聽聽exit;聽聽}聽聽}else{聽聽聽聽$ll_times聽=聽0;聽聽

$_SESSION['ll_lasttime']聽=聽$ll_nowtime;聽聽

$_SESSION['ll_times']聽=聽$ll_times;聽聽

}