PhpOffice\PhpPresentation\Reader\PowerPoint2007::loadFile PHP Method

    protected function loadFile($pFilename)
    {
        $this->oPhpPresentation = new PhpPresentation();
        $this->oPhpPresentation->removeSlideByIndex();
        $this->oPhpPresentation->setAllMasterSlides(array());
        $this->filename = $pFilename;
        $this->oZip = new ZipArchive();
        $this->oZip->open($this->filename);
        $docPropsCore = $this->oZip->getFromName('docProps/core.xml');
        if ($docPropsCore !== false) {
            $this->loadDocumentProperties($docPropsCore);
        }
        $docPropsCustom = $this->oZip->getFromName('docProps/custom.xml');
        if ($docPropsCustom !== false) {
            $this->loadCustomProperties($docPropsCustom);
        }
        $pptViewProps = $this->oZip->getFromName('ppt/viewProps.xml');
        if ($pptViewProps !== false) {
            $this->loadViewProperties($pptViewProps);
        }
        $pptPresentation = $this->oZip->getFromName('ppt/presentation.xml');
        if ($pptPresentation !== false) {
            $this->loadDocumentLayout($pptPresentation);
            $this->loadSlides($pptPresentation);
        }
        return $this->oPhpPresentation;
    }