Let's talk about the solution for php printing templates

In web development, printing function is a very common requirement. Usually we need to convert web page content into PDF or print it out directly. For PHP developers, it is a common practice to use printing templates to achieve these needs.

A printing template is a predefined document that includes the layout, style and format of the elements that need to be printed. In the printing template, developers can add dynamic content (such as variables, loops, judgments, etc.) to generate the content that needs to be printed. The advantage of printing templates is that they can quickly generate the content that needs to be printed, and at the same time ensure the consistency and beauty of printing.

Below we will introduce some solutions for PHP printing templates and how to use them to generate PDF or print output.

1. TCPDF

TCPDF is a popular php PDF library that provides an API for creating PDF files. TCPDF supports multiple fonts, tables, images, Unicode characters, etc. Developers can create a PDF file through TCPDF and then download it or output it to a browser.

To use TCPDF, we need to first introduce the TCPDF class into the project and then instantiate a TCPDF object. Then generate the required PDF content through the methods provided by the TCPDF object. Here is a simple example:

require_once('tcpdf/tcpdf.php');

$pdf = new TCPDF();

// 设置PDF文档的头部信息
$pdf->SetHeaderData($ln='', $lw=0, $title='TCPDF Example', $subject='TCPDF Tutorial', $creator='TCPDF', $author='Nicola Asuni', $header=true, $footer=false);

// 设置PDF文档的基本信息
$pdf->SetTitle('TCPDF Example');
$pdf->SetSubject('TCPDF Tutorial');
$pdf->SetKeywords('TCPDF, PDF, example');

// 创建一页PDF
$pdf->AddPage();

// 添加一些文本内容
$pdf->SetFont('helvetica', '', 14);
$pdf->Write(0, 'Hello World!', '', 0, 'C', true, 0, false, false, 0);

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

In this example, we create a PDF file using TCPDF, add some text content, and then download it directly. Of course, we can also output it to the browser.

2. FPDF

FPDF is another php library for generating PDF files. Different from TCPDF, FPDF's API is relatively simple and more lightweight than TCPDF. But it only supports ISO-8859-1 encoding.

Using FPDF, we can first introduce the FPDF class and then instantiate an FPDF object. In order to generate a PDF document, we need to call some methods on the FPDF object, such as SetFont, Cell, Output, etc. Here is a simple example:

require_once('fpdf/fpdf.php');

$pdf = new FPDF();
$pdf->AddPage();
$pdf->SetFont('Arial', 'B', 16);
$pdf->Cell(40, 10, 'Hello World!');
$pdf->Output();

In this example, we use FPDF to create a PDF file, add some text content, and then output it to the browser.

3. DOMPDF

DOMPDF is a library that uses php and CSS to generate PDF files. It can convert html and css into PDF files, and also supports some common CSS properties and selectors. The advantage of DOMPDF is that it supports CSS, allowing developers to design element styles in PDF files through CSS.

To use DOMPDF, we need to introduce the DOMPDF class first, and then instantiate a DOMPDF object. Then we can put the HTML code that needs to be converted in a string, and then use the load_html method of the DOMPDF object to load it into DOMPDF for rendering. Finally, we call the Output method of the DOMPDF object to output the generated PDF file to the browser or save it to a file. Here is a simple example:

require_once 'dompdf/autoload.inc.php';

use Dompdf\Dompdf;

$html = 'nbsp;html>


<meta>
<title>Hello World</title>
<style>
body {
    font-family: Arial, sans-serif;
}
</style>


<div>
<p>Hello World!</p>
</div>

';

$dompdf = new Dompdf();
$dompdf->loadHtml($html);
$dompdf->setPaper('A4', 'portrait');
$dompdf->render();
$dompdf->output();

4. PrintJS

PrintJS is a modern printing library that provides a consistent printing experience for all browsers on the same page. PrintJS can generate PDF files, print HTML content, and send commands to the printer.

To use PrintJS, we need to introduce the PrintJS library first, and then call the method of the PrintJS object on the page to perform the printing operation. Here is a simple example:

<script></script>

<button>Print PDF</button>

<button>Print HTML</button>

In this example, we use PrintJS to print PDF files and HTML content. We can use the print button to trigger the printing operation.

Summary

In PHP development, printing template is a very practical tool, which provides a way to quickly generate content that needs to be printed. In this article, we introduce several PHP printing template solutions, including TCPDF, FPDF, DOMPDF and PrintJS. Whether you need to convert your content into a PDF file or print it directly, these solutions can help you get the job done. I hope these methods can help PHP developers implement the printing function.

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