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