Basic RFI Protection

<?php
//// Copyright 2011-~ Muammer TURKMEN
class rfistop{
    public $silarray=array("php","txt","asp","aspx","html");
    public $dizinarray=array("public_html","htdocs","httpdocs","httpsdocs");
    public function rfidurdur($durdur="exit",$yapilacak="index.php"){
        foreach($_REQUEST as $gelen=>$veri){
            if(preg_match("#(./|http|.\\\)#si",$veri)){
                if($this->rfikontrol($veri)===false){
                    switch($durdur){
                        case "exit":
                            exit();
                        break;
                        case "header":
                            header("Location:".$yapilacak);
                        break;
                        case "custom":
                            echo $yapilacak;
                        break;

                    }
                }else{
                    echo "tamam";
                }
            }
        }
    }
    private function rfikontrol($suzulecek){
        if(preg_match("#http#si",$suzulecek)){
            $urlal=array_reverse(explode("/",$suzulecek));
            return $this->rfiuygunluk($urlal[0]);
        }else{
            if(preg_match("#(..\\\|../|.\\\|./)#si",$suzulecek)){
                $dizinust="";
                $ustsayi="";
                if(preg_match("#/#si",__FILE__)){
                    $dizinbol=array_reverse(explode("/",__FILE__));
                }else{
                    $dizinbol=array_reverse(explode("\\",__FILE__));
                }

                foreach($this->dizinarray as $dizin){
                    $sayi=array_search($dizin,$dizinbol);
                    if($sayi>0){
                        $dizinust=$sayi;
                    }
                }
                $ustsayi+=substr_count($suzulecek,".\\");
                $ustsayi+=substr_count($suzulecek,"./");
                if($dizinust<$ustsayi){
                    return false;
                }else{
                    return true;
                }
            }
        }
    }
    private function rfiuygunluk($detect){
        $uzanti=array_reverse(explode(".",$detect));
        if(in_array($uzanti[0],$this->silarray)){
            return false;
        }else{
            return true;
        }
    }

}

/*
$test=new rfistop;        // New Class
$deneme1->rfidurdur("custom","Stop Lamer <img src="http://atmoner.com/wp-includes/images/smilies/icon_biggrin.gif" alt=":D" class="wp-smiley"> ");        . Add Custom Message
$deneme1->rfidurdur(); or $deneme1->rfidurdur("exit"); Use command when locates error. default is exit();
$deneme1->rfidurdur("header","deneme.php"); Send Attacker to defined page.

****** when upload use $_FILES else will be caught to class. **********
*/

//// Copyright 2011-~ Muammer TURKMEN
?>