PHP is a popular server-side scripting language used to create dynamic and interactive websites. Unlike HTML, PHP code is processed on the web server before the page is sent to the user's browser.

Since PHP runs on the server, visitors only receive the generated HTML. The original PHP source code always remains hidden, making applications more secure and easier to manage.

PHP is one of the most widely used programming languages for web development because it is fast, reliable, easy to learn, and supported by almost every web hosting provider.

• Creates dynamic web pages
• Works seamlessly with HTML
• Supports databases such as MySQL
• Ideal for both small and enterprise-level projects

PHP provides everything needed to develop powerful web applications and dynamic websites.

• User registration and login systems
• Database-driven websites
• Contact and registration forms
• Blogs and news portals
• E-commerce websites
• Content management systems (CMS)
• Administration dashboards
• REST APIs and web services

Every time a user visits a PHP page, several processes take place before the page appears in the browser.

1. The browser requests a PHP file (for example, index.php).
2. The web server receives the request.
3. The Zend Engine reads and executes the PHP code.
4. PHP generates plain HTML.
5. The server sends the HTML to the user's browser.

The Zend Engine is the core engine of PHP. It interprets, compiles, and executes PHP code before the response is sent to the browser.

• Reads PHP scripts
• Executes PHP instructions
• Converts PHP into HTML output
• Provides fast and optimized performance
• Enhanced significantly with PHP Next Generation (PHPNG)

• Open source and free to use
• Server-side programming language
• Can be embedded directly into HTML
• Fast and efficient performance
• Supports multiple databases
• Cross-platform compatibility
• Secure and reliable
• Easy for beginners to learn
• Inspired by languages such as C, Java, and Perl

PHP has remained one of the world's most popular web development languages for decades because of its simplicity, flexibility, and massive community support.

• Easy syntax for beginners
• Supported by nearly every hosting provider
• Large ecosystem and community
• Powers millions of websites worldwide
• Used by popular platforms such as WordPress, Laravel, and Joomla
• Suitable for both personal and enterprise applications