PHP + MySQL

What is MySQL?

MySQL is a database used to store and manage data.

PHP connects to MySQL to interact with stored data.

Connecting to MySQL

Selecting Data

Fetching Data

Inserting Data

Using Forms with Database

Prepared Statements

Prepared statements protect against SQL injection.

Full Example

Why PHP + MySQL is Important

• Store and retrieve data
• Build real applications
• Used in login systems
• Core backend functionality

Common Mistakes

• Not checking connection errors
• Not using prepared statements
• Not sanitizing input

Practice

Create a form that inserts a user into a database and displays all users.

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