PHP is a popular programming language for web development. It is a server-side language that can be used to create dynamic web pages and web applications. PHP is open-source and has a large and active community, making it easy to find resources and support online.

Some popular PHP frameworks for web development include Laravel, Symfony, and CodeIgniter. These frameworks provide pre-built tools and functionality to make it easier to develop web applications in PHP.

1. Building dynamic websites: PHP can be used to create websites that display different content based on user input or other variables.
2. Creating web applications: PHP can be used to build complex web applications such as content management systems, e-commerce platforms, and social media websites.
3. Connecting to databases: PHP can be used to connect to various databases, such as MySQL, to store and retrieve data from web applications.
4. Handling forms: PHP can be used to process user input from forms on web pages, such as contact forms or login forms.
5. Managing user authentication and authorization: PHP can be used to manage user login and access control to various parts of a web application.

Overall, PHP is a powerful language for web development with a wide range of uses and a supportive community.