/**
* Constructs the Zend_Io_FileWriter class with given path to the file. By
* default the file is opened in write mode without altering its content
* (ie r+b mode if the file exists, and wb mode if not).
*
* @param string $filename The path to the file.
* @throws Zend_Io_Exception if the file cannot be written
*/
public function __construct($filename, $mode = null)
{
if ($mode === null) {
$mode = file_exists($filename) ? 'r+b' : 'wb';
}
if (($fd = fopen($filename, $mode)) === false) {
throw new Zend_Io_Exception('Unable to open file for writing: ' . $filename);
}
parent::__construct($fd);
}
