How to use Hyperf framework for PDF generation

How to use the Hyperf framework for PDF generation requires specific code examples

With the advent of the digital age, PDF (Portable Document Format) format files are used in various fields play an important role. PDF format files are highly portable and visual, making it the first choice in many scenarios. In web development, generating PDF files is a common requirement. This article will introduce how to use the Hyperf framework to generate PDF files and provide detailed code examples.

First, we need to install the Hyperf framework and some related dependencies. You can install the Hyperf framework through Composer and execute the following command:

composer create-project hyperf/hyperf my-project

After the installation is complete, we need to install the dependent libraries for PDF generation. In this article, we use tcpdf as a library for PDF generation. We can install the tcpdf library through Composer and execute the following command:

composer require tecnickcom/tcpdf

After the installation is complete, we can start writing code. First, we need to create a PDF generation controller. In the Hyperf framework, controllers are used to process HTTP requests and generate corresponding responses. We can generate a controller by executing the following command:

php bin/hyperf.php generate:controller PdfController

After execution, a PdfController.php file will be generated in the app/Controller folder. We can write the code to generate PDF in this file.

First, we need to introduce the tcpdf library and some necessary classes. At the beginning of the PdfController.php file, add the following code:

use TCPDF;
use PsrHttpMessageResponseInterface;
use HyperfHttpServerAnnotationController;
use HyperfHttpServerAnnotationRequestMapping;

Next, add a method in the PdfController class for generating PDF files. For example, we create a method called generate:

/**
 * @RequestMapping(path="/pdf/generate", methods="GET")
 */
public function generate(): ResponseInterface
{
    $pdf = new TCPDF(); // 创建一个TCPDF实例

    // 设置PDF的属性
    $pdf->SetCreator('Hyperf Framework');
    $pdf->SetAuthor('Your Name');
    $pdf->SetTitle('Sample PDF');
    $pdf->SetSubject('Generating PDF using Hyperf Framework');
    $pdf->SetKeywords('PDF, Hyperf');

    // 添加一页
    $pdf->AddPage();

    // 设置内容
    $content = 'Hello, this is a sample PDF generated using Hyperf Framework.';
    $pdf->writeHTML($content, true, false, true, false, '');

    // 输出PDF文件
    $pdf->Output('sample.pdf', 'D');
}

In the above code, we first create a TCPDF instance. Then, the properties of the PDF are set, including creator, author, title, and keywords. Next, we added a page and set up the content. Finally, send the generated PDF file to the browser by calling the Output method.

The last step, we need to register our controller in the route. Add the following code in the routes.php file:

use AppControllerPdfController;

Router::addRoute(['GET'], '/pdf/generate', [PdfController::class, 'generate']);

Now, we have completed the entire process of generating PDF files using the Hyperf framework. By accessing /pdf/generate, you can generate a PDF file named sample.pdf and download it locally.

The code example provided above demonstrates how to use the tcpdf library in the Hyperf framework to generate PDF files. Through this example, you can customize the content and format of the generated PDF according to actual needs. Hope this article is helpful to you!

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