Learning PHP 7 (Video 18)

This video tutorial introduces the PHP Data Objects (PDO) extension, which provides a uniform interface for accessing databases in PHP. It covers setting up a PDO connection to a MySQL database, executing basic SQL queries, and using prepared statements to enhance security and performance. The tutorial emphasizes the importance of handling exceptions and cleaning up temporary files. It concludes with a brief mention of the Doctrine library as a potential enhancement to PDO.

What is the main advantage of using PDO in PHP?

• It is the only option available in PHP 7.

• It provides a data access abstraction layer.

• It is easier to learn than MySQL functions.

• It is faster than MySQL functions.

What is a good practice when making a connection to a MySQL database using PDO?

• Always use global variables.

• Enable exception errors and use try/catch statements.

• Use only default settings.

• Avoid using any error handling.

What is the main difference between PDO Exec and PDO Query methods?

• PDO Exec returns a PDO statement object.

• PDO Query returns an integer of rows affected.

• PDO Exec returns an integer of rows affected.

• PDO Query is used only for insert statements.

How do prepared statements in PDO help improve security?

• They allow for more complex queries.

• They simplify the code structure.

• They prevent SQL injection.

• They make the code run faster.

What is the purpose of using placeholders in PDO prepared statements?

• To bind parameters and increase flexibility.

• To make the code look cleaner.

• To reduce the number of queries.

• To automatically generate SQL code.