/**
* @param string $file
* @throws Exception If file does not exist or is not readable
*/
public function __construct($file)
{
$this->_file = $file;
if (!file_exists($file) || !is_file($file) || !is_readable($file)) {
throw new \Exception('Unable to open file for reading: ' . $file);
}
parent::__construct(file_get_contents($file));
}
