Now, if we go to the form shown here to add a post, and you look on the right-hand side, you don't see a Featured Image box, which you may have seen in other WordPress themes or on other WordPress websites. The reason for that is we didn't include that functionality:
- Let's go into our themes folder, and we'll create a file and save it as functions.php. Now, this is where we can put a custom function; this is where we can hook into certain parts of the code, register widgets, and do all that—basically, anything dynamic.
- Here, we'll create a setup function. To do this, we will add the following code block:
<?php ...
