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Example of parsing and processing HTML/XML to generate PDF files using PHP

PHPzOriginal: 2023-09-11 14:27:371338browse

Title: Example of using PHP to parse and process HTML/XML to generate PDF files

In web development, we often encounter the need to convert HTML or XML documents into Conversion to PDF files is required. By generating PDF files, we can easily save web page content into a printable or distributable format, retaining the original style and layout. In this article, we will provide an example of using PHP to parse and process HTML/XML documents and convert them into PDF files.

To implement this example, we need to use some libraries and dependencies in PHP. Among them, we will use the following key components:

DomDocument class: PHP's built-in class for processing XML and HTML documents. We will use it to parse and process HTML/XML content.
TCPDF Library: This is a popular PHP library for generating PDF files. It provides rich features that can be used to create various types of PDF files and supports custom styles and layouts.

Now, let’s start writing code to implement this example. First, we need to introduce the TCPDF library into PHP. You can download the latest version of the TCPDF library from the official website (http://www.tcpdf.org/) and unzip it to your project path.

After introducing the TCPDF library, we can write a piece of PHP code to parse HTML or XML documents and convert them into PDF files. The following is a sample code:

<?php
require_once('tcpdf/tcpdf.php');

// 要转换的HTML/XML内容
$content = "
<!DOCTYPE html>
<html>
<head>
    <title>示例HTML文档</title>
</head>
<body>
<h1>欢迎使用PHP生成PDF！</h1>
<p>这是一个示例HTML文档。</p>
</body>
</html>
";

// 创建一个TCPDF实例
$pdf = new TCPDF();

// 设置文档属性
$pdf->SetCreator(PDF_CREATOR);
$pdf->SetAuthor('Your Name');
$pdf->SetTitle('示例PDF文件');
$pdf->SetSubject('使用PHP生成PDF');
$pdf->SetKeywords('PDF, PHP, HTML, XML');

// 添加一页PDF页面
$pdf->AddPage();

// 将HTML/XML内容解析为PDF内容
$pdf->writeHTML($content, true, false, true, false, '');

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

In the above sample code, we first create a TCPDF instance and set some document properties, such as creator, author, title, subject and keywords. Then, we added a PDF page and used the $pdf->writeHTML() method to parse the HTML/XML content into PDF content. Finally, we use the $pdf->Output() method to output the generated PDF file to the browser as an attachment.

Please note that among the parameters of the writeHTML() method, we set the first parameter to the HTML/XML content to be converted, and the second parameter to true To parse external CSS styles, the third parameter is set to false to parse external JavaScript code, the fourth parameter is set to true to parse external images, and the last two parameters are respectively Set to false and ''.

Now, when you run the above code, it will parse the given HTML/XML document and convert it into a PDF file named example.pdf. You can use a browser to open the file and save or print it.

With this example, we show how to use PHP to parse and process HTML/XML documents and convert them into PDF files. You can customize and extend this example to meet your specific needs. At the same time, for more complex PDF file generation, the TCPDF library also provides many other functions and options, you can refer to the official documentation for more details.

I hope this article will help you understand and use PHP to parse and process HTML/XML to generate PDF files, and provide you with a good starting point to implement similar functions. Happy programming!

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