Dividir PDF no PHP SDK

<?php

    require_once 'vendor/autoload.php';

    use Aspose\Pdf\Configuration;
    use Aspose\Pdf\Api\PdfApi;
    use Aspose\Pdf\Model\SplitResult;

    function splitSingle()
    {
        // Load credentials from JSON file
        $credentials = json_decode(file_get_contents('credentials.json'), true);
        $appSid = $credentials['id'];
        $appKey = $credentials['key'];

        // Initialize the PDF API
        $config = new Configuration();
        $config->setAppSid($appSid);
        $config->setAppKey($appKey);
        $pdfApi = new PdfApi($config);

        // Define local and storage file names
        $localFileName = 'input.pdf';
        $storageFileName = 'uploaded_input.pdf';

        try {
            // Upload the PDF file to Aspose Cloud Storage
            $pdfApi->uploadFile($storageFileName, fopen($localFileName, 'r'));

            // Split the PDF document
            $splitResult = $pdfApi->splitDocument($storageFileName);

            // Check if the split operation was successful
            if ($splitResult->getCode() === 200) {
                echo "Split operation successful.\n";

                // Download each split document
                $documents = $splitResult->getResult()->getDocuments();
                foreach ($documents as $index => $document) {
                    $fileName = "page" . ($index + 1) . ".pdf";
                    $fileContent = $pdfApi->downloadFile($document->getHref());
                    file_put_contents($fileName, $fileContent);
                    echo "Downloaded: $fileName\n";
                }
            } else {
                echo "Error: " . $splitResult->getStatus() . "\n";
            }
        } catch (Exception $e) {
            echo 'Exception: ',  $e->getMessage(), "\n";
        }
    }