public static function get_slide_by_id($dataDir = null) { # Instantiate Presentation class that represents the presentation file $pres = new Presentation($dataDir . 'Aspose.pptx'); # Getting Slide ID $id = $pres->getSlides()->get_Item(0)->getSlideId(); # Accessing Slide by ID $slide = $pres->getSlideById($id); print "Slide: " . $slide . PHP_EOL; }