Must Use Plugins / mu-plugins folder

Any Plugin that we create under this folder will be automatically called by wordpress.

Under wp-content folder, create mu-plugins folder

wp-content/mu-plugins

We can name the new file custom_post_types.php

And we will copy paste the registered custom post type that we previously added to functions.php

So custom_post_types.php looks like this now:

<?php

//Create New Post Type Here
function custom_post_types(){
    register_post_type('event', array(


        //This will add functionality to the permalink etc
        'has_archive' => true,

        //Make it public
        'public' => true,
        //Make it be edited on new "Block" gutenmberg conf
        'show_in_rest' => true,        
        //Admin Left Navigation Label here
        'labels' => array(
            //Name of Admin title on Nav
            'name' => 'Events',
            // //Name of Add new on dropdown
            'add_new' => 'Add New Event',            
            // //Name of Add new event when posting
            'add_new_item' => 'Add New Event',
            // 'edit_item' => 'Edit Event',
            // //menu item All Events link
            'all_items' => 'All Events',
            // 'singular_name' => 'Event'
        ),
        //Admin Icon Label
        'menu_icon' => 'dashicons-calendar'

    ));
}
add_action('init', 'custom_post_types');

//Remember! no closing php tag here

register_post_type()