[PHP] Script Obfuscate 1.1

<?php
/**
* Obfuscate V.1
* Indonesian Coder
*/
class obfuscate
{
    var $text,$string;
    public function __construct()
    {
        #$this->string = self::cleanTxt($string);
    }
    public function strToHex($string)
    {
        $this->text = bin2hex($string);
        $this->text = chunk_split($this->text,2,"\x");
        $this->text = "\x" . substr($this->text,0,-2);
        return $this->text;
    }
    public function genStr($x=10)
    {
        $this->string = "qwertyuiopasdfghjklzxcvbnm";
        $this->output = "";
        for ($i=0; $i < $x; $i++) {
            $this->output .= $this->string[rand(0,strlen($this->string) - 1)];
        }
        return $this->output;
    }
    public function cleanTxt($string)
    {
        return str_replace(['<?php','?>'], "", $string);
    }
    public function execute($string)
    {
        $this->content = "";
        $this->content = self::cleanTxt($string);
        $this->content = self::encode($this->content);
        $this->content = self::strToHex($this->content);
        $this->var1 = self::genStr(10);
        $this->var2 = self::genStr(15);
        $this->output = '$'.$this->var1.'= base64_decode("\x59\x6d\x46\x7a\x5a\x54\x59\x30\x58\x32\x52\x6c\x59\x32\x39\x6b\x5a\x51\x3d\x3d");$'.$this->var2.'=base64_decode("\x63\x33\x52\x79\x58\x33\x4a\x76\x64\x44\x45\x7a");@eval($'.$this->var1.'($'.$this->var2.'("'.$this->content.'")));';
        return $this->output;
    }
    public function encode($string)
    {
        $this->text = str_rot13(base64_encode($string));
        return $this->text;
    }
}
final class apache27 extends obfuscate
{
    public function __construct()
    {
        echo " Simple Obfusate By Mr.Apache27 - Thanks To Indonesian Hacker Rules\n";
        echo " Input File : ";
        $file = trim(fgets(STDIN));
        self::_run($file);
    }
    public function _run($file)
    {
        $file = file_get_contents($file) or die(self::msg("File Not FOund"));
        $data = self::execute($file);
        $output = '<?php /*Obfusate By Mr.Apache27*/ '.$data.' ?>';
        self::msg("Success Obfusate , Genereting FIle....");
        $files = self::genStr(15).".txt";
        self::save($files,$output);
        self::msg("File Name : {$files}");
    }
    public function save($file,$data){
        $fp = @fopen($file, "a");
        @fwrite($fp, $data);
        @fclose($fp);
    }
    public function msg($data){
        echo " [".date("h:i:s")."] {$data}\n";
    }
}
new apache27();