PHP+MySQL is a common combination of Web development technologies, in which PHP is a server-side programming language and MySQL is a relational database management system. This technology combination can be used to create dynamic Web applications, such as websites, blogs, e-commerce websites and so on.

PHP is an open source server-side scripting language, which can be used to handle the communication between Web servers and Web browsers. PHP can handle database, file upload, form verification and other tasks through built-in functions and extensions, which is flexible and extensible.

MySQL is an open source relational database management system with high reliability, stability and high performance. MySQL uses standard SQL language to manage data and supports advanced functions such as transactions, stored procedures and triggers.

Using the combination technology of PHP and MySQL, we can combine PHP script with MySQL database to realize the development of dynamic Web application. For example, you can connect MySQL database with PHP, query the data in the database, and then display the query results on the web page to realize the function of dynamically generating web pages. In addition, the combination of PHP and MySQL technology can also realize user authentication, data storage, data statistics and other functions.