PMA\libraries\File::read PHP Method

    public function read($size)
    {
        switch ($this->_compression) {
            case 'application/bzip2':
                return bzread($this->_handle, $size);
            case 'application/gzip':
                return gzread($this->_handle, $size);
            case 'application/zip':
                $result = mb_strcut($this->_content, $this->_offset, $size);
                $this->_offset += strlen($result);
                return $result;
            case 'none':
            default:
                return fread($this->_handle, $size);
        }
    }