PHP経由でPDFをPNGに変換

// Load the PDF document
$document = new Document($inputFile);

// Get the collection of pages in the document
$pages = $document->getPages();

// Get the total number of pages in the document
$count = $pages->size();

// Set the resolution for the PNG images
$resolution = new devices_Resolution(300);

// Create a new PNG device with the specified resolution
$imageDevice = new devices_PngDevice($resolution);

// Loop through each page in the document
for ($pageCount = 1; $pageCount <= $document->getPages()->size(); $pageCount++) {
    // Set the output image file name for the current page
    $imageFileName = $imageFileNameTemplate . $pageCount . '.png';

    // Get the current page from the collection
    $page = $document->getPages()->get_Item($pageCount);

    // Process the current page and save it as a PNG image
    $imageDevice->process($page, $imageFileName);

    // Append the image file name and its file size to the response data
    $responseData = $responseData . $imageFileName . " Filesize: " . filesize($imageFileName) . PHP_EOL;
}