Class Example

gistfile1.txt

<?php

class Init_Menu_Item {

  public function __construct() {
    $this->initialize();
  }

  public function initialize() {
    add_action( 'admin_menu', array( $this, 'init_menu_item') );
  }

  public function init_menu_item() {
    add_options_page(
      __( 'Better WP Environments', 'bwpe' ),
      __( 'Better WP Environments', 'bwpe' ),
      'manage_options',
      'bwpe-options',
      'render_options_display'
    );
  }

  
}

Without knowing the full context of this class (that is, is it part of another set of classes or is it just doing this one thing?), it's hard for me to say whether or not this is exactly how I'd do it.

But, for the most part, I think this looks okay. There are some changes I'd make, though:

• I wouldn't call the initialize function in the constructor; otherwise, you might as well just put the body of initialize in the constructor. Instead, use the constructor to set properties. If there are none, then disregard it (PHP will always provide an implied, default, and empty constructor).
• The add_action could be used be another class or not. It depends on how this class intends to be used. If you want to really de-couple the business logic and the integration with WordPress, I'd create a second class that takes an instance of Init_Menu_Item and then wires the init_menu_item function in the hook. I'll have an example below.
• Finally, naming the class as a verb (that is, Init_Menu_Item) isn't standard practice and it's really good OOP. Instead, name it for what it is (which as far as I can tell is a menu item for Better WP Environments). So, with that said, I'd probably so something like this:

First, define the main menu item class:

<?php
class Better_WP_Environments_Menu_Item {

    public function init() {

      add_options_page(
        __( 'Better WP Environments', 'bwpe' ),
        __( 'Better WP Environments', 'bwpe' ),
        'manage_options',
        'bwpe-options',
        'render_options_display'
      );        

    }

}

Secondly, introduce a class for specifically handling the hook registration:

class BWPE_Loader {

  public function setup_menu_item( $menu_item ) {
    add_action( 'admin_menu', array( $menu_item, 'init' ) );
  }

}

Then I'd have a plugin bootstrap file do something like this:

function bwpe_setup_menus() {

  // Instantiate the classes.
  $menu_item = Better_WP_Environments_Menu_Item();
  $loader = new BWPE_Loader();

  // Register the menu item.
  $loader->setup_menu_item( $menu_item) ;

}

From here you may be able to call bwpe_setup_menus() right after it's defined or you may need to have it registered with a hook. It depends all on when you're wanting this to fire. It needs to be when the admin_menu hook is available, if nothing else.