file ext

file extr

<?php 

class archive{

    protected $handle_write = null;
    protected $handle_read  = null;



    protected $index = 1;

    function compress($file_name, $buffer_size){

        $i = 0 ;

        if(  $this->handle_write == null  ){  
            $this->handle_write = fopen('test.data', 'ab');
        }
        if(  $this->handle_read == null  ){
            $this->handle_read = fopen( $file_name, 'rb');
        }
        $size   = stat( $file_name );
        $block  = pack('a255a14', $file_name, $size[7]);
            
        fwrite($this->handle_write, $block);   

        while (!feof($this->handle_read)) {
            
            $buffer = fread($this->handle_read, $buffer_size);   
            fwrite($this->handle_write, $buffer);                   
        }

        $this->eof = pack( 'a269', '' );
        fwrite($this->handle_write, $this->eof);                   
        fclose($this->handle_write);                      
        fclose($this->handle_read);
        $this->handle_write = null;
        $this->handle_read  = null;
        $this->index++;
    }

    function ex( $zip_file ){
        
        $size = 0;    
        if(  $this->handle_read == null  ){
            $this->handle_read = fopen( $zip_file, 'rb');
        }

        $flag = true;
        $file_name = '';
        while( $flag ){
            $chunk = fread( $this->handle_read, 255 );
            if( ! $chunk ) break; 

            $data  = unpack('a255', $chunk);
            echo $file_name = trim($data[1]);
            $chunk      = fread( $this->handle_read, 14 );
            $data       = unpack('a14', $chunk);
            echo $size  = trim( $data[1] );
            $offset     = 269;
            $h  = fopen( 'out/'.$file_name, 'ab' );
            $sz = 0;
        

            $i = 1;
            while( $size >= $sz ){

                $buffer_length = ( $size - $sz ) > 512000 ?  512000 : ( $size - $sz );
                if( $buffer_length == 0 ) break;
                $sz += $buffer_length;
                $data = fread( $this->handle_read,  $buffer_length );
                fwrite( $h, $data);
            }
            fclose($h);
            fread( $this->handle_read,  269 );
        
        }
    }
}


$c = new archive;
$c->compress('i/1.mp4', 512000);
$c->compress('i/2.3gp', 512000);

//$c->ex('test.data');