What is the function of tcpdf in PHP?

TCPDF is a PHP class library used for creating PDF files. It allows developers to generate PDF documents with various layouts and formats using PHP code, including text, images, tables, charts, and links.

The main features of TCPDF include:

1. Create a PDF document: You can use TCPDF to generate a brand new PDF document.
2. You can include various types of content in a PDF document, such as text, images, and tables.
3. Style settings allow you to customize various elements of the document, such as font, color, borders, and more.
4. Customized Layout: The layout and format of the document can be customized according to the needs, including page size, margins, headers, and footers.
5. Support for multiple languages: able to handle various languages and character sets, including Chinese, Japanese, and more.
6. Export and print: The generated PDF document can be exported for saving or directly printed.

In general, TCPDF offers a simple and powerful method to generate PDF documents using PHP, suitable for creating various types of reports, contracts, invoices, certificates, and other documents.