MiKo PiKKo

<?php
header("Content-Type:text/plain");
$file = file_get_contents("torrentFile.torrent"); // Torrent File
$data = TorrentReader::parse($file, $reader);     // Parse Data Torrent
print_r($data);


// TorrentReader
// ======================================================
class TorrentReader{
    static public function parse($data,&$reader=null){
        $reader=new self($data);
        $reader->_parse();
        return $reader->output;
    }
    public $debug=false;
    protected $types=array();
    protected $dataLength=-1;
    public $input='';
    public $output;
    public $iterations=-1;
    public function __construct($data){
        $this->input=$data;
        $this->dataLength=strlen($this->input);
    }
    public function _parse(){
        $key=$content=null;
        $php='';
        $keyval='root';
        $start=0;
        $i=0;
        while($start<$this->dataLength&&$i<99999){
            if(!is_numeric($start)){
                break;
            }
            $i++;
            if('e'==substr($this->input,$start,1)){
                $ct=array_pop($this->types);
                $php.=str_repeat("\t",count($this->types));
                $php.='),'."\n";
                $key=true;
                if($this->debug){
                    echo '<p><b>END CURRENT '.$ct.'</b></p>';
                }
                $start+=1;
                continue;
            }
            else if('d'==substr($this->input,$start,1)){
                $php.=str_repeat("\t",count($this->types));
                $php.=($this->dict()?"'".addslashes($keyval)."'".' => array(':'array(')."\n";
                $key=true;
                if($this->debug){
                    echo '<p><b>NEW DICTIONARY</b></p>';
                }
                $start+=1;$this->types[]='dict';
                continue;
            }
            else if('l'==substr($this->input,$start,1)){
                $php.=str_repeat("\t",count($this->types));
                $php.=($this->dict()?"'".addslashes($keyval)."'".' => array(':'array(')."\n";
                if($this->debug){echo '<p><b>NEW LIST</b></p>';
            }
                $start+=1;
                $this->types[]='list';
                continue;
            }
            if(in_array(substr($this->input,$start,1),array('i','f'))){
                $end=strpos($this->input,'e',$start+1);
                $content=substr($this->input,$start+1,$end-$start-1);
                if(!is_numeric($content)){break;}
                $content=(float)$content;
                $start=$end+1;
            }
            else{
                $lpos=strpos($this->input,':',$start);
                $length=substr($this->input,$start,$lpos-$start);
                if(!is_numeric($length)){break;}
                $start=$lpos+1;
                $content=substr($this->input,$start,$length);
                $start+=$length;
            }
            if('dict'!=$this->ct()||!$key){
                $php.=str_repeat("\t",count($this->types));
                $php.=($this->dict()?"'".$keyval."'".' => '."'".addslashes($content)."'":"'".addslashes($content)."'").",\n";
            }
            if($this->debug){
                echo '<pre>';var_dump($content);
                echo '</pre>';
            }
            if('dict'==$this->ct()){
                $keyval=$content;
                $key=!$key;
            }
        }
        $phpArray=false;
        @eval('$phpArray = array('.$php.');');
        if($phpArray&&isset($phpArray[0])){
            $this->output=$phpArray[0];
            $this->iterations=$i;
            return true;
        }
        return false;
    }
    protected function ct(){
        return !$this->types?null:$this->types[count($this->types)-1];
    }
    protected function dict(){
        return 'dict'==$this->ct();
    }
}
// ======================================================
?>