    public function testStandardPortIsNullIfSchemeChanges()
    {
        $uri = new Uri('http://example.com:443');
        $this->assertSame('http', $uri->getScheme());
        $this->assertSame(443, $uri->getPort());

        $uri = $uri->withScheme('https');
        $this->assertNull($uri->getPort());
    }
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.