Definition: TCPDF stands for "Text-Driven Content Delivery Framework". It's a framework that helps to provide efficient, scalable, and distributed web content delivery services. TCPDF.php is part of this framework. PHP (PHP scripting language) plays a vital role in it because it provides functionality to handle the HTTP requests from various sources like browsers and servers, as well as send responses back to clients. The PHP code for TCPDF.php can be found in the /www/ folder under your website's root directory. This file contains the following: 1.

include

- This is a preprocessor command that defines how a function or module should be executed when it's first accessed. 2.

header

- Defines the HTTP response headers, which includes the Content-type (text/html), Content-Length (0), and other information specific to the HTTP request method. 3.

set_headers()

- Used to set up HTTP headers before sending data over a connection. Here, you can specify a list of header values that are used in the response. 4.

send_response()

- Sends a response back to the client using an HTTP response code and body. The PHP file is responsible for generating the HTML (if not already present) for the webpage. The content of this file is then sent through a network connection from one server (browser, server, etc.) to another server or any other destination, which can include local files, databases, etc. TCPDF.php is often used in conjunction with various components like PHPMyAdmin for database management, AJAX to update the page content dynamically, and so forth.

tcpdf.php