[WordPress] How to transform post title into UPPERCASE without plugins

To transform the post title into different style, for example uppercase, you don’t need to use any plugin. In this article I will show you how to do it simply by using WordPress filter.

What we are going to do is to add a filter hook, so that the title of a post will go through this before displaying to the user.

Add in your functions.php:

This line can also be changed for other different transformation.