WP Plugin + OOP: Adding Menu Page doesn’t create required effect

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So, I’ve been staring at this problem for a few days now. I am attempting to push my skills further in PHP development, and decided to tackle a WP plugin with an OOP approach. I know that WP isn’t necessarily the best choice for this, but I love a good challenge.

I am writing a Helper class, as I intend to use some functions fairly regularly, but I am running into a little bit of an issue.

Helper Class

Class Helper implements HelperInterface
{

/**
 * Default Options for making an admin page
 *
 * @var array
 */
public $default_options = [
    'slug'          =>      '',
    'title'         =>      '',
    'page_title'    =>      '',
    'parent'        =>      null,
    'id'            =>      '',
    'capability'    =>      'update_core',
    'icon'          =>      'dashicons-admin-generic',
    'position'      =>      null,
    'file_name'     =>      null,
    'desc'          =>      '',
];

/**
 * Store options passed in by user.
 *
 * @var array
 */
public $options = [];

public $parent_id;

public $settings_id;

/**
 * Stores the media type for a stylesheet
 *
 * @var string
 */
public $media_type;

public function __construct(  )
{

}

public function add_new_page( $opt )
{   
    $this->options = array_merge( $this->default_options, $opt );
    add_action( 'admin_menu', function() {

        add_menu_page(
            $this->options['page_title'],
            $this->options['title'],
            $this->options['capability'],
            $this->options['slug'],
            array($this, display_page_template),
            $this->options['icon'],
            $this->options['position']
        );
    } );

}

Helper Class Usage

Class GoogleMaps 
{

protected $helper;

public function __construct()
{
    $this->helper = new Helper;
    $this->helper->add_new_page([
        'slug'          =>      'google-maps',
        'title'         =>      'EdsGoogleMaps',
        'page_title'    =>      'EdsGoogleMaps',
        'capability'    =>      'update_core',
        'icon'          =>      'dashicons-admin-generic',
        'position'      =>      null,
        'file_name'     =>      'GoogleMapsHome.php',
    ]);

    $this->helper->add_new_page([
        'slug'          =>      'google-maps-2',
        'title'         =>      'EdsGoogleMaps2',
        'page_title'    =>      'EdsGoogleMaps2',
        'capability'    =>      'update_core',
        'icon'          =>      'dashicons-admin-generic',
        'position'      =>      null,
        'file_name'     =>      'GoogleMapsHome.php',
    ]);

    $this->helper->add_new_page([
        'slug'          =>      'google-maps-3',
        'title'         =>      'EdsGoogleMaps3',
        'page_title'    =>      'EdsGoogleMaps3',
        'capability'    =>      'update_core',
        'icon'          =>      'dashicons-admin-generic',
        'position'      =>      null,
        'file_name'     =>      'GoogleMapsHome.php',
    ]);

    }
}

Current Output

Things I’ve tried

  • Putting the array into a foreach loop. Not working because, will either return the first one twice or return all three again.
  • Original route was as a pass by reference type of thing. Passing the variables from the function and storing them in global vars within the class. Still not working due to same issue as described
  • My current thoughts are that it is something to do with the use of the add_action and an anonymous function alongside the fact that the add_action gets called everytime the helper function is called.

    Hopefully someone has some sort of idea of a solution for this, and hopefully I have been clear enough in my issue.

    Thanks 🙂

    Read more here:: WP Plugin + OOP: Adding Menu Page doesn’t create required effect

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