Anti Flood | www.pemula.info

<?php
if (!isset($_SESSION)) {
    //session_start();
}

// getting informations about user
$useragent = $_SERVER['HTTP_USER_AGENT'];
$bots = "google msnbot lycos scooter fast-webcrawler technorati yahoo bloglines blogsearch gigabot";

function get_ip(){
// check if the user's information is already in file
    $ip = getenv("REMOTE_ADDR");
    $file = "ipb.txt";
    $fr = fopen($file, "r") or exit("Fisier indisponibil!");
    $data = fread($fr, filesize($file));
    fclose($fr);
    if (strpos($data,$ip) == FALSE) {

        // writing the user's information in a file
        $fw = fopen($file, "a") or exit("Fisier indisponibil!");
        fwrite($fw, "\n" . $ip . "; ");
        fclose($fw);
        }

    else {
    $ippos = strpos($data,$ip);
    $pv = strpos($data,';',$ippos);
    $n = strlen($data);
    $j==0;
    for($i=0; $i<$n; $i++){
        if($i==$pv+2){
            $datan[$j]="*";
            $datan[$j+1]=$data[$i]; $j+=2;
            }
        else{
            $datan[$j]=$data[$i]; $j++;
            }
        }
    $frw = fopen($file, "w") or exit("Fisier indisponibil!");
        for($i=0;$i<$j;$i++){
            fwrite($frw, $datan[$i]);
            }
    fclose($frw);
    $datan='';
    }
}

// check if the user it's a crawler bot
if (strpos($bots,$useragent) == FALSE) {

// anti flood protection
if($_SESSION['last_session_request'] > time() - 4){
        $_SESSION['last_session_request'] = time();
            header("location: /antiflood.html"); get_ip();
            exit;

    }
}

$_SESSION['last_session_request'] = time();
?>