PHP (which originally stood for Personal Home Page and now stands for PHP: Hypertext Preprocessor) is a popular open-source server-side scripting language designed primarily for web development.

Key Features of PHP:
Server-Side Execution: Code runs on the web server, and the result (usually HTML) is sent to the browser.

Embedded in HTML: PHP code can be embedded directly within HTML pages using <?php ... ?> tags.

Dynamic Content: Commonly used to generate dynamic page content, interact with databases, handle forms, and manage sessions.

Database Integration: Works well with databases, especially MySQL and PostgreSQL.

Cross-Platform: Runs on various operating systems like Windows, Linux, and macOS.

Open Source: Free to use and has a large community.