Why must learn pdo in php?

Question

The mysql_* functions are no longer maintained and community has begun the deprecation process. Instead you should learn about prepared statements and use either PDO or MySQLi.

If you cannot decide, this article should help you choose. Though, you should know, that PDO is able to work with different kinds of RDBMS, while MySQLi is made for a specific one.

Answer 1

what article?

...did you just copy and paste that from a tech news site? ._.

Answer 2

it is from stackoverflow because it's a nice and clean answer