PHP实现PPT/PPTX转PDF遇加载错误，求PPT问题解决办法

背景与实现思路 #

我有大量PPT和PPTX文件，需要用PHP转换为PDF。基于PHPOffice已经实现了XLS/XLSX转PDF，但PHPPresentation的Writer功能远不如PhpSpreadsheet完善，因此尝试结合MPDF/Dompdf和Imagick编写了转换代码：

$objReader = PresentationIOFactory::createReader('PowerPoint2007');
$objPHPPresentation = $objReader->load($pf);

// Create a new Imagick object for image manipulation
$imagick = new \Imagick();

// Loop through each slide and convert it to an image
$slideCount = $objPHPPresentation->getSlideCount();
for ($i = 0; $i < $slideCount; $i++) {
    $oSlide = $objPHPPresentation->getSlide($i);
    $oDrawing = new Drawing\Gd();
    $oDrawing->setRenderingFunction(Drawing\Gd::RENDERING_PNG);
    $oDrawing->setImageResource($oSlide->render());
    $oDrawing->setSize($oSlide->getExtent()->getWidth(), $oSlide->getExtent()->getHeight());
    $oDrawing->setMimeType(Drawing\Gd::MIMETYPE_DEFAULT);
    $imageString = $oDrawing->getContents();

    // Add the image to the Imagick object
    $imagick->readImageBlob($imageString);
}

// Create a new mPDF object
$mpdf = new MpdfLib([
    'mode' => 'utf-8',
    'format' => [$objPHPPresentation->getLayout()->getDocument()->getDocumentPart()->getExtent()->getWidth(), $objPHPPresentation->getLayout()->getDocument()->getDocumentPart()->getExtent()->getHeight()]
]);

// Add the slide images to the mPDF object
$imagick->resetIterator();
foreach ($imagick as $index => $slideImage) {
    // Output slide image as a base64-encoded data URI
    $dataUri = 'data:image/png;base64,' . base64_encode($slideImage->getImageBlob());

    // Add the slide image to the mPDF object
    $mpdf->AddPage();
    $mpdf->WriteHTML('<img src="' . $dataUri . '" />');
}

// Save the PDF
$mpdf->Output($outputFilePath, 'F');

echo "PowerPoint file has been converted to PDF.";

遇到的错误问题 #

PPTX文件加载错误 #

Fatal error: Uncaught TypeError:PhpOffice\PhpPresentation\Reader\PowerPoint2007::loadShapeRichText(): Argument #3 ($oSlide) must be of type PhpOffice\PhpPresentation\Slide\AbstractSlide, PhpOffice\PhpPresentation\Slide\Note given, called in C:\xampp\htdocs\vendor\phpoffice\phppresentation\src\PhpPresentation\Reader\PowerPoint2007.php on line 1375 and defined in C:\xampp\htdocs\vendor\phpoffice\phppresentation\src\PhpPresentation\Reader\PowerPoint2007.php:888
    Stack trace:
    #0 C:\xampp\htdocs\vendor\phpoffice\phppresentation\src\PhpPresentation\Reader\PowerPoint2007.php(1375): PhpOffice\PhpPresentation\Reader\PowerPoint2007->loadShapeRichText(Object(PhpOffice\Common\XMLReader), Object(DOMElement), Object(PhpOffice\PhpPresentation\Slide\Note))
    #1 C:\xampp\htdocs\vendor\phpoffice\phppresentation\src\PhpPresentation\Reader\PowerPoint2007.php(755): PhpOffice\PhpPresentation\Reader\PowerPoint2007->loadSlideShapes(Object(PhpOffice\PhpPresentation\Slide\Note), Object(DOMNodeList), Object(PhpOffice\Common\XMLReader))
    #2 C:\xampp\htdocs\vendor\phpoffice\phppresentation\src\PhpPresentation\Reader\PowerPoint2007.php(369): PhpOffice\PhpPresentation\Reader\PowerPoint2007->loadSlideNote('notesSlide1.xml', Object(PhpOffice\PhpPresentation\Slide))
    #3 C:\xampp\htdocs\vendor\phpoffice\phppresentation\src\PhpPresentation\Reader\PowerPoint2007.php(169): PhpOffice\PhpPresentation\Reader\PowerPoint2007->loadSlides('<?xml version="...')
    #4 C:\xampp\htdocs\vendor\phpoffice\phppresentation\src\PhpPresentation\Reader\PowerPoint2007.php(136): PhpOffice\PhpPresentation\Reader\PowerPoint2007->loadFile('C:/xampp/htdocs...')
    #5 C:\xampp\htdocs\a\create_thumbnail.php(70): PhpOffice\PhpPresentation\Reader\PowerPoint2007->load('C:/xampp/htdocs...')
    #6 C:\xampp\htdocs\a\create_thumbnail.php(142): getThumbnail('../uploads/pptx...', 'Results Discuss...', 'C:/xampp/htdocs...', '../uploads/tmp/', 'pptx', '126', Object(mysqli))
    #7 {main}
      thrown in C:\xampp\htdocs\vendor\phpoffice\phppresentation\src\PhpPresentation\Reader\PowerPoint2007.php on line 888

PPT文件加载错误 #

Fatal error: Uncaught TypeError: 

PhpOffice\Common\Microsoft\OLERead::getStream(): Argument #1 ($stream) must be of type int, null given, called in C:\xampp\htdocs\vendor\phpoffice\phppresentation\src\PhpPresentation\Reader\PowerPoint97.php on line 487 and defined in C:\xampp\htdocs\vendor\phpoffice\common\src\Common\Microsoft\OLERead.php:203
    Stack trace:
    #0 C:\xampp\htdocs\vendor\phpoffice\phppresentation\src\PhpPresentation\Reader\PowerPoint97.php(487): PhpOffice\Common\Microsoft\OLERead->getStream(NULL)
    #1 C:\xampp\htdocs\vendor\phpoffice\phppresentation\src\PhpPresentation\Reader\PowerPoint97.php(454): PhpOffice\PhpPresentation\Reader\PowerPoint97->loadOLE()
    #2 C:\xampp\htdocs\vendor\phpoffice\phppresentation\src\PhpPresentation\Reader\PowerPoint97.php(442): PhpOffice\PhpPresentation\Reader\PowerPoint97->loadFile()
    #3 C:\xampp\htdocs\vendor\phpoffice\phppresentation\src\PhpPresentation\IOFactory.php(73): PhpOffice\PhpPresentation\Reader\PowerPoint97->load('C:/xampp/htdocs...')
    #4 C:\xampp\htdocs\a\create_thumbnail.php(112): PhpOffice\PhpPresentation\IOFactory::load('C:/xampp/htdocs...')
    #5 C:\xampp\htdocs\a\create_thumbnail.php(177): getThumbnail('../uploads/ppt/...', 'Architecture_xx...', 'C:/xampp/htdocs...', '../uploads/tmp/', 'ppt', '139', Object(mysqli))
    #6 {main}
      thrown in C:\xampp\htdocs\vendor\phpoffice\common\src\Common\Microsoft\OLERead.php on line 203

已修复的问题（PPTX） #

通过修改PHPPresentation源码修复了PPTX加载问题，修改内容如下：

文件：vendor/phpoffice/phppresentation/src/PhpPresentation/Reader/PowerPoint2007.php #

原代码：

protected function loadShapeRichText(XMLReader $document, DOMElement $node, AbstractSlide $oSlide): void
 {
        if (!$document->elementExists('p:txBody/a:p/a:r', $node)) {
            return;
        }

替换为：

protected function loadShapeRichText(XMLReader $document, DOMElement $node, $oSlide): void
{
    if (!$document->elementExists('p:txBody/a:p/a:r', $node) || !$oSlide instanceof AbstractSlide) {
        return;
    }

文件：vendor/phpoffice/phppresentation/src/PhpPresentation/Style/Border.php #

原代码：

public function setLineWidth(int $pValue = 1): self
    {
        $this->lineWidth =  $pValue;
    }

替换为：

public function setLineWidth($pValue = 1): self
    {
        $this->lineWidth = (int) $pValue;
    }

求助需求 #

目前仍未解决PPT文件的加载错误，恳请提供共享主机环境下的有效解决办法。

内容的提问来源于stack exchange，提问作者Osama Hussein