[Link] How to create, read, update and delete (CRUD) with PDO, MySQLi and MySQL the right way (prepared statements)
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Mike Dalisay has written an excellent tutorial on the CORRECT USAGE of basic CRUD functions (create, read, update, delete) with PDO, mysqli and mysql. Please note that basic pure mysql_ functions are outdated for some years now and should be avoided! Only bloody amateurs use mysql_. This is an very valueable tutorial if you want to start with PDO (the correct way to do database requests!) or want to have a look on how to use mysqli correctly (using prepared statements). Take the time to read through this, it’s essential stuff for your daily work.
The tutorials contains videos, screenshots, copy&paste code examples and a really really good explaination.
Mike Dalisay – PHP and MySQL CRUD Tutorial for Beginners