1. Log in to the administration page of your WordPress installation.
2. Click on Plugins in the left-hand navigation menu.
3. Check whether the Chapter 2 - Private Item Text plugin is currently active and deactivate it if it is.
4. Copy the entire contents of the ch2-private-item-text directory and rename the copy ch2-oo-private-item-text.
5. Navigate to the newly renamed folder and rename the main PHP code file ch2-oo-private-item-text.php.
6. Open the newly renamed plugin file in a code editor.

7. Update the plugin header to change the name of the plugin to Chapter 2 - Object-Oriented - Private Item Text.
8. Right after the plugin header, add the following text to declare a new class for our plugin and specify a constructor method for this class:

class CH2_OO_Private_Item_Text {      
    function __construct() { 
    }      
} 
     
$my_ch2_oo_private_item_text = new CH2_OO_Private_Item_Text(); 

9. Move the calls to the add_shortcode and add_action functions to be placed inside of the class constructor.
10. Modify the second argument of the add_shortcode and add_action functions as follows:

add_shortcode( 'private', array( $this, 
               'ch2pit_private_shortcode' ) ); 
 
add_action( 'wp_enqueue_scripts', array( $this, 
            'ch2pit_queue_stylesheet' ) ); 

11. Move the complete ch2pit_private_shortcode and ch2pit_queue_stylesheet functions inside of the class body (after the constructor method and before the class closing bracket).
12. Save and close the modified file.
13. Log in to the administration page of your development WordPress installation.
14. Click on Plugins in the left-hand navigation menu.
15. Activate the new plugin.
16. Visit your site to see that the private item content functionality is still in place and works as it did before.