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How is PHP different from HTML?

PHP (Hypertext Preprocessor) and HTML (Hypertext Markup Language) serve distinct purposes in web development.

HTML is a markup language used for creating the structure and content of web pages. It consists of tags that define headings, paragraphs, lists, links, images, and other basic elements that browsers render to display web content. For example:

<!DOCTYPE html>
<html>
<head>
    <title>Sample Page</title>
</head>
<body>
    <h1>Welcome to My Website</h1>
    <p>This is a paragraph of text.</p>
    <a href="https://www.example.com">Visit Example.com</a>
</body>
</html>

PHP, on the other hand, is a server-side scripting language designed for web development. It can be embedded within HTML code and is executed on the server before the page is sent to the browser. PHP is used to generate dynamic content, interact with databases, handle form submissions, and perform various server-side tasks. Here's an example of PHP embedded in HTML:

<!DOCTYPE html>
<html>
<head>
    <title>Sample PHP Page</title>
</head>
<body>
    <?php
        echo "<h1>Welcome to My Website</h1>";
        echo "<p>The current date and time is: " . date("Y-m-d H:i:s") . "</p>";
    ?>
    <a href="https://www.example.com">Visit Example.com</a>
</body>
</html>

In this PHP example, the echo statements generate dynamic content, such as the current date and time, which will be different each time the page is loaded.

For web development that requires both static and dynamic content, cloud services like Tencent Cloud offer solutions that support both HTML and PHP. For instance, Tencent Cloud's Web Application Firewall (WAF) can help protect web applications built with HTML and PHP from various web attacks, ensuring the security and reliability of your website.