src/Archive/Tar.php
function _openReadWrite()
    {
        if ($this->_compress_type == 'gz')
            $this->_file = @gzopen($this->_tarname, "r+b");
        else if ($this->_compress_type == 'bz2') {
            $this->_error('Unable to open bz2 in read/write mode \''
			              .$this->_tarname.'\' (limitation of bz2 extension)');
            return false;
        } else if ($this->_compress_type == 'none')
            $this->_file = @fopen($this->_tarname, "r+b");
        else {
            $this->_error('Unknown or missing compression type ('
			              .$this->_compress_type.')');
            return false;
        }

        if ($this->_file == 0) {
            $this->_error('Unable to open in read/write mode \''
			              .$this->_tarname.'\'');
            return false;
        }

        return true;
    }
function _openReadWrite()
    {
        if ($this->_compress_type == 'gz')
            $this->_file = @gzopen($this->_tarname, "r+b");
        else if ($this->_compress_type == 'bz2') {
            $this->_error('Unable to open bz2 in read/write mode \''
			              .$this->_tarname.'\' (limitation of bz2 extension)');
            return false;
        } else if ($this->_compress_type == 'none')
            $this->_file = @fopen($this->_tarname, "r+b");
        else {
            $this->_error('Unknown or missing compression type ('
			              .$this->_compress_type.')');
            return false;
        }

        if ($this->_file == 0) {
            $this->_error('Unable to open in read/write mode \''
			              .$this->_tarname.'\'');
            return false;
        }

        return true;
    }
{{{ _openReadWrite()