What is PDO? Why should you choose PDO to operate your database?

How to correctly connect to database using PDO object?

Tips for quickly adding data using PDO

Safely update data using PDO objects

Things to note when deleting data from PDO objects

Use PDO's fetch() method to traverse the result set one by one

Tips for quickly retrieving the entire result set using fetchAll()

How PDO directly operates the result set (skipping parsing)

Use model mapping to process result sets (emphasis)

[Update as an example] Quickly understand the principle and operation process of PDO preprocessing

I have learned the basics of PDO, let’s summarize it.