PDO – PHP database extension

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PDO (PHP Data Objects) is a PHP extension through which we can access and work with databases. Though PDO is similar in many aspects to mySQLi, it is better to work with for the following reasons:

  •  It is better protected against hackers.
  • It is consistent across databases, so it can work with MySQL as well as other types of databases (SQLite, Oracle, PostgreSQL, etc.)
  •  It is object oriented at its core.

In this PDO  tutorial you will find recipes for 4 basic functions that we perform with the database: insertion, selection, update, and deletion. The recipes are intended to work with MySQL, but we can easily switch it with another database.
How to connect with the database through PDO?
It is considered good practice to wrap the database connection within a try-catch block so that, if anything goes wrong, an exception will be thrown. We can customize the error message but, in order to keep things simple, we’ll settle with the error message that PDO provides. In order to connect to the database, we’ll need the database name, username, and password.

How to close the database connection?

PHP automatically closes the database connection but, if the need arises, we can deliberately close the connection with the following line of code:

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3 Comments
  1. […] PDO Extension, you can develop complex, dynamic, and user-friendly web applications. Through the tutorials, PHP […]

  2. jijo says

    hi mr anuj kumar… in case if i want to change the root@local to other user for the admin login page… which one do i need to configure first…. I have put car rental system on web server… configured script on config file… and the main page is running ok… but cannot log to admin page… Error: SQLSTATE[HY000] [1045] Access denied for user ‘root’@’localhost’ (using password: NO).

    1. Anuj Kumar says

      Database connection error. Configure your database properly

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