PhpOffice\PhpPresentation\PhpPresentation::createSlide PHP Method

    public function createSlide()
    {
        $newSlide = new Slide($this);
        $this->addSlide($newSlide);
        return $newSlide;
    }

 /**
  * Read Slide
  *
  * @param \DOMElement $nodeSlide
  */
 protected function loadSlide(\DOMElement $nodeSlide)
 {
     // Core
     $this->oPhpPresentation->createSlide();
     $this->oPhpPresentation->setActiveSlideIndex($this->oPhpPresentation->getSlideCount() - 1);
     if ($nodeSlide->hasAttribute('draw:name')) {
         $this->oPhpPresentation->getActiveSlide()->setName($nodeSlide->getAttribute('draw:name'));
     }
     if ($nodeSlide->hasAttribute('draw:style-name')) {
         $keyStyle = $nodeSlide->getAttribute('draw:style-name');
         if (isset($this->arrayStyles[$keyStyle])) {
             $this->oPhpPresentation->getActiveSlide()->setBackground($this->arrayStyles[$keyStyle]['background']);
         }
     }
     foreach ($this->oXMLReader->getElements('draw:frame', $nodeSlide) as $oNodeFrame) {
         if ($this->oXMLReader->getElement('draw:image', $oNodeFrame)) {
             $this->loadShapeDrawing($oNodeFrame);
             continue;
         }
         if ($this->oXMLReader->getElement('draw:text-box', $oNodeFrame)) {
             $this->loadShapeRichText($oNodeFrame);
             continue;
         }
     }
     return true;
 }