    public function testGetDeep()
    {
        $bag = new ParameterBag(array('foo' => array('bar' => array('moo' => 'boo'))));

        $this->assertEquals(array('moo' => 'boo'), $bag->get('foo[bar]', null, true));
        $this->assertEquals('boo', $bag->get('foo[bar][moo]', null, true));
        $this->assertEquals('default', $bag->get('foo[bar][foo]', 'default', true));
        $this->assertEquals('default', $bag->get('bar[moo][foo]', 'default', true));
    }
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.