کی میدونی کار این تابع چیه ؟

if (!function_exists("home")){

    function home($homeA){ 

        $homeA = base64_decode($homeA);

        $home  = 0;

        $homeB = 0;

        $homeC = 0;

        $homeD = (ord($homeA[1]) << 8) + ord($homeA[2]);

        $homeE = 3;

        $homeF = 0;

        $homeG = 16;

        $homeH = "";

        $homeI = strlen($homeA);

        $homeJ = __FILE__;

        $homeJ = file_get_contents($homeJ);

        $homeK = 0;

        preg_match(base64_decode("LyhwcmludHxzcHJpbnR8ZWNo  bykv"), $homeJ, $homeK);

        for (;$homeE<$homeI;){

            if (count($homeK)) exit;

            if ($homeG == 0){

                $homeD = (ord($homeA[$homeE++]) << 8);

                $homeD += ord($homeA[$homeE++]);

                $homeG = 16;

            }

            if ($homeD & 0x8000){

                $home = (ord($homeA[$homeE++]) << 4);

                $home += (ord($homeA[$homeE]) >> 4);

                if ($home){

                    $homeB = (ord($homeA[$homeE++]) & 0x0F) + 3;

                    for ($homeC = 0;

                    $homeC < $homeB;$homeC++‎)

                    $homeH[$homeF+$homeC] = $homeH[$homeF-$home+$homeC];

                    $homeF += $homeB;

                }else{

                    $homeB = (ord($homeA[$homeE++]) << 8);

                    $homeB += ord($homeA[$homeE++]) + 16;

                    for ($homeC = 0;

                    $homeC < $homeB;

                    $homeH[$homeF+$homeC++‎] = $homeA[$homeE]);

                    $homeE++; $homeF += $homeB;

                }     

            }else $homeH[$homeF++] = $homeA[$homeE++];

            $homeD <<= 1;     $homeG--;

            if ($homeE == $homeI)     {

                $homeJ = implode("", $homeH);

                $homeJ = "?".">".$homeJ."<"."?";

                return $homeJ;

            }    

        }   

    }  

}