This page describes how to join multiple PDF files or update PDF attributes in PHP using the Pdfcrowd API. The API is easy to use and the integration takes only a few of lines of code.
We also offer other installation options (Composer, GitHub).
Authentication is needed in order to use the Pdfcrowd API. The credentials used for accessing the API are your Pdfcrowd username and the API key.
demo
ce544b6ea52a5621fb9d55f8b542d14d
To get your personal API credentials, you can start a free API trial or buy the API license.
<?php require "pdfcrowd.php"; try { // create the API client instance $client = new \Pdfcrowd\PdfToPdfClient("demo", "ce544b6ea52a5621fb9d55f8b542d14d"); // configure the conversion $client->addPdfFile("/path/to/cover.pdf"); $client->addPdfFile("/path/to/proposal.pdf"); $client->addPdfFile("/path/to/price.pdf"); $client->addPdfFile("/path/to/contact.pdf"); // run the conversion and write the result to a file $client->convertToFile("offer.pdf"); } catch(\Pdfcrowd\Error $why) { // report the error error_log("Pdfcrowd Error: {$why}\n"); // rethrow or handle the exception throw $why; } ?>
<?php require "pdfcrowd.php"; try { // create the API client instance $client = new \Pdfcrowd\PdfToPdfClient("demo", "ce544b6ea52a5621fb9d55f8b542d14d"); // configure the conversion $client->addPdfFile("/path/to/cover.pdf"); $client->addPdfFile("/path/to/proposal.pdf"); $client->addPdfFile("/path/to/price.pdf"); $client->addPdfFile("/path/to/contact.pdf"); // run the conversion and store the result into the "pdf" variable $pdf = $client->convert(); // at this point the "pdf" variable contains PDF raw data and // can be sent in an HTTP response, saved to a file, etc. } catch(\Pdfcrowd\Error $why) { // report the error error_log("Pdfcrowd Error: {$why}\n"); // rethrow or handle the exception throw $why; } ?>
<?php require "pdfcrowd.php"; try { // create the API client instance $client = new \Pdfcrowd\PdfToPdfClient("demo", "ce544b6ea52a5621fb9d55f8b542d14d"); // configure the conversion $client->addPdfFile("/path/to/cover.pdf"); $client->addPdfFile("/path/to/proposal.pdf"); $client->addPdfFile("/path/to/price.pdf"); $client->addPdfFile("/path/to/contact.pdf"); // create an output stream for the conversion result $output_stream = fopen("offer.pdf", "wb"); // check for a file creation error if (!$output_stream) throw new \Exception(error_get_last()['message']); // run the conversion and write the result into the output stream $client->convertToStream($output_stream); // close the output stream fclose($output_stream); } catch(\Pdfcrowd\Error $why) { // report the error error_log("Pdfcrowd Error: {$why}\n"); // rethrow or handle the exception throw $why; } ?>
<?php require "pdfcrowd.php"; try { // create the API client instance $client = new \Pdfcrowd\PdfToPdfClient("demo", "ce544b6ea52a5621fb9d55f8b542d14d"); // configure the conversion $client->addPdfRawData(file_get_contents("/path/to/cover.pdf")); $client->addPdfRawData(file_get_contents("/path/to/proposal.pdf")); $client->addPdfRawData(file_get_contents("/path/to/price.pdf")); $client->addPdfRawData(file_get_contents("/path/to/contact.pdf")); // run the conversion and write the result to a file $client->convertToFile("offer.pdf"); } catch(\Pdfcrowd\Error $why) { // report the error error_log("Pdfcrowd Error: {$why}\n"); // rethrow or handle the exception throw $why; } ?>
<?php require "pdfcrowd.php"; try { // create the API client instance $client = new \Pdfcrowd\PdfToPdfClient("demo", "ce544b6ea52a5621fb9d55f8b542d14d"); // configure the conversion $client->addPdfRawData(file_get_contents("/path/to/cover.pdf")); $client->addPdfFile("/path/to/proposal.pdf"); $client->addPdfRawData(file_get_contents("/path/to/price.pdf")); $client->addPdfFile("/path/to/contact.pdf"); // run the conversion and write the result to a file $client->convertToFile("offer.pdf"); } catch(\Pdfcrowd\Error $why) { // report the error error_log("Pdfcrowd Error: {$why}\n"); // rethrow or handle the exception throw $why; } ?>
<?php require "pdfcrowd.php"; try { // create the API client instance $client = new \Pdfcrowd\PdfToPdfClient("demo", "ce544b6ea52a5621fb9d55f8b542d14d"); // configure the conversion $client->addPdfFile("/path/to/proposal.pdf"); $client->setPageWatermark("/path/to/watermark.pdf"); // run the conversion and write the result to a file $client->convertToFile("company_offer.pdf"); } catch(\Pdfcrowd\Error $why) { // report the error error_log("Pdfcrowd Error: {$why}\n"); // rethrow or handle the exception throw $why; } ?>
<?php require "pdfcrowd.php"; try { // create the API client instance $client = new \Pdfcrowd\PdfToPdfClient("demo", "ce544b6ea52a5621fb9d55f8b542d14d"); // configure the conversion $client->addPdfFile("/path/to/not_linearized.pdf"); $client->setLinearize(true); // run the conversion and write the result to a file $client->convertToFile("linearized.pdf"); } catch(\Pdfcrowd\Error $why) { // report the error error_log("Pdfcrowd Error: {$why}\n"); // rethrow or handle the exception throw $why; } ?>
<?php require "pdfcrowd.php"; try { // create the API client instance $client = new \Pdfcrowd\PdfToPdfClient("demo", "ce544b6ea52a5621fb9d55f8b542d14d"); // configure the conversion $client->setDebugLog(true); $client->addPdfRawData(file_get_contents("/path/to/cover.pdf")); $client->addPdfRawData(file_get_contents("/path/to/proposal.pdf")); // run the conversion and write the result to a file $client->convertToFile("offer.pdf"); // print URL to the debug log echo "Debug log url: " . $client->getDebugLogUrl() . "\n"; // print the number of available conversion credits in your account echo "Remaining credit count: " . $client->getRemainingCreditCount() . "\n"; // print the number of credits consumed by the conversion echo "Consumed credit count: " . $client->getConsumedCreditCount() . "\n"; // print the unique ID of the conversion echo "Job id: " . $client->getJobId() . "\n"; // print the total number of pages in the output document echo "Page count: " . $client->getPageCount() . "\n"; // print the size of the output in bytes echo "Output size: " . $client->getOutputSize() . "\n"; } catch(\Pdfcrowd\Error $why) { // report the error error_log("Pdfcrowd Error: {$why}\n"); // rethrow or handle the exception throw $why; } ?>
Refer for details to the API Method Reference.