	protected function _dirname($path) {
		$parts = explode($this->separator, trim($path, $this->separator));
		array_pop($parts);
		return $this->separator .  join($this->separator, $parts);
	}
The software constructs all or part of an SQL command using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the intended SQL command when it is sent to a downstream component.