您无法将演示文稿文件上传到Google幻灯片.您需要执行的操作是使用Google文档类型将文件导入Google云端硬盘.看看 参考文档 其中有一个如何实现此目的的示例.以下是如何实现所需需求的示例.

You cannot upload a presentation file to Google Slides. What you are required to do is to import the file to Google Drive using a Google Doc Type. Take a look at the reference documentation which has an example of how to achieve this. Here are the examples of how to achieve what you need.

PPT到Google幻灯片演示文稿:

$service = new Google_Service_Drive($client);

// Create a new file
$file = new Google_Service_Drive_DriveFile(array(
    'name' => 'PPT Test Presentation',
    'mimeType' => 'application/vnd.google-apps.presentation'
));

// Read power point ppt file
$ppt = file_get_contents("SamplePPT.ppt");

// Declare optional parameters
$optParams = array(
    'uploadType' => 'multipart',
    'data' => $ppt,
    'mimeType' => 'application/vnd.ms-powerpoint'
);

// Import pptx file as a Google Slide presentation
$createdFile = $service->files->create($file, $optParams);

// Print google slides id
print "File id: " . $createdFile->id;

PPTX到Google幻灯片演示文稿:

$service = new Google_Service_Drive($client);

// Create a new file
$file = new Google_Service_Drive_DriveFile(array(
    'name' => 'PPTX Test Presentation',
    'mimeType' => 'application/vnd.google-apps.presentation'
));

// Read Powerpoint pptx file
$pptx = file_get_contents("SamplePPTX.pptx");

// Declare opts params
$optParams = array(
    'uploadType' => 'multipart',
    'data' => $pptx,
    'mimeType' => 'application/vnd.openxmlformats-officedocument.presentationml.presentation'
);

// Import pptx file as a Google Slide presentation
$createdFile = $service->files->create($file, $optParams);

// Print google slides id
print "File id: " . $createdFile->id;

PDF到Google Document Doc :(对于Google Slide Presentation而言是不可能的)

$service = new Google_Service_Drive($client);

// Create a new file
$file = new Google_Service_Drive_DriveFile(array(
    'name' => 'PDF Test Document',
    'mimeType' => 'application/vnd.google-apps.document'
));

// Read pdf file
$pdf = file_get_contents("SamplePDF.pdf");

// Declare opts params
$optParams = array(
    'uploadType' => 'multipart',
    'data' => $pdf,
    'mimeType' => 'application/pdf'
);

// Import pdf file as a Google Document File
$createdFile = $service->files->create($file, $optParams);

// Print google document id
print "File id: " . $createdFile->id;

每个代码段中唯一更改的是mimeType.有关Mime类型的参考，您可以访问此处，然后有关Google Mime类型的参考，您可以在此处访问.

The only thing that changes in each code snippet is the mimeType. For a reference of Mime Types you can visit here and for a reference of Google Mime Types you can visit here.