In PHP, you can connect to a MySQL database using the mysqli_connect function.

In PHP, you can use the mysqli_connect function to establish a connection to a MySQL database. This function takes four parameters: the host, username, password, and database name. It returns a connection object that can be used for further database operations. Ensure that you provide the correct credentials and the appropriate server details to establish a successful connection. The mysqli_connect function is part of the mysqli extension in PHP, which provides an object-oriented approach to interacting with MySQL databases.