Got this working the other day in a single-file php plugin which only consisted of functions.

Now I am trying it out with the WordPress Plugin Boilerplate which is an OOP approach with a lot of different classes.

In short, I am looking at two different classes/files

includes/class-ebay-keyword-suggest.php and admin/class-ebay-keyword-suggest-admin.php

The first being the core plugin class, and the latter being the admin-specific functionality.

First, class-ebay-keyword-suggest.php __construct()'s

public function __construct() {
    if ( defined( 'EBAY_KEYWORD_SUGGEST_VERSION' ) ) {
        $this->version = EBAY_KEYWORD_SUGGEST_VERSION;
    } else {
        $this->version = '1.0.0';
    $this->plugin_name = 'ebay-keyword-suggest';


load_dependencies loads the class-ebay-keyword-suggest-admin.php file, among others.

ends with defining $this->loader as such:

$this->loader = new Ebay_Keyword_Suggest_Loader();

define_admin_hooks loads up my scripts and stylesheets

private function define_admin_hooks() {
    $plugin_admin = new Ebay_Keyword_Suggest_Admin( $this->get_plugin_name(), $this->get_version() );
    $this->loader->add_action( 'admin_enqueue_scripts', $plugin_admin, 'enqueue_styles' );
    $this->loader->add_action( 'admin_enqueue_scripts', $plugin_admin, 'enqueue_scripts' );

Proceeded by register_admin_menu:

private function register_admin_menu() {
    $plugin_admin = new Ebay_Keyword_Suggest_Admin( $this->get_plugin_name(), $this->get_version() );
    add_action( 'admin_init', array( $plugin_admin, 'ebay_keyword_suggest_settings_init' ) );
    add_action( 'admin_menu', array( $plugin_admin, 'ebay_keyword_suggest_add_admin_menu' ) );
    add_action( 'admin_enqueue_scripts', array( $plugin_admin, 'enqueue_localize' ) );

ebay_keyword_suggest_settings_init is where I am registering the option/setting ebay_keyword_suggest_settings with callbacks

public function ebay_keyword_suggest_settings_init() { 

register_setting( 'pluginPage', 'pluginPage', array($this, 'ebay_keyword_suggest_settings'));

    __( 'Your section description', '' ),
    array($this, 'ebay_keyword_suggest_settings_section_callback'),

    __( 'Settings field description', '' ), 
    array($this, 'ebay_keyword_suggest_checkbox_field_0_render'),

Next in line in the add_action functions of register_admin_menu via ebay_keyword_suggest_add_admin_menu

public function ebay_keyword_suggest_add_admin_menu() {
    add_options_page( 'eBay Keyword Suggest', 'eBay Keyword Suggest', 'manage_options', 'ebay_keyword_suggest',  array($this, 'ebay_keyword_suggest_options_page') );

Then we get to this line:

add_action( 'admin_enqueue_scripts', array( $plugin_admin, 'enqueue_localize' ) );

public function enqueue_localize( $hook ) {
    $getoption = get_option( 'ebay_keyword_suggest_settings' );
    $enabled = $getoption['ebay_keyword_suggest_checkbox_field_0'];
    wp_localize_script( $this->plugin_name, 'ekw_script_vars', array( 'enabled' => __($enabled) ) );

As you can see the first instance of get_option is initiated here under the variable $getoption... doing a var_dump always returns false (and of course wp_localize_script does not work properly as it is not getting the proper option variable.

Getting this working in a single php file was very easy with a combination of add_action's above the functions and a simple initiation of register_setting( 'pluginPage', 'title_char_count_settings' ); followed by retrieving the setting with just simple get_option( 'title_char_count_settings' );

This OOP approach is a lot more tricky... I have to be close I'm thinking.. where is the hiccup in this?

  • You used register_setting( 'pluginPage', 'pluginPage' - is that second pluginPage intended?
    – Sally CJ
    Commented Feb 15, 2020 at 17:50
  • Yeah... it's just option_group and option_name they can be the same. Ref: developer.wordpress.org/reference/functions/register_setting Commented Feb 15, 2020 at 17:51
  • 1
    Yes, but it's the name of the database option, which you should use with get_option(). Like with the second parameter in register_setting( 'pluginPage', 'title_char_count_settings' ) ..
    – Sally CJ
    Commented Feb 15, 2020 at 17:55
  • 1
    Yes, wow, that's exactly right! Completely overlooked on my part. Changed as noted and now it works. Thank you. If you want to add an answer I can accept it so this can be closed :) Commented Feb 15, 2020 at 19:56

1 Answer 1


The second parameter for register_setting() is the database option name which you would use with get_option() just as you've done successfully with the title_char_count_settings option: register_setting( 'pluginPage', 'title_char_count_settings' ) and get_option( 'title_char_count_settings' );.

So I'm guessing that you either:

  1. Made a typo in the register_setting() call in your ebay_keyword_suggest_settings_init() function:

    // You used this:
    register_setting( 'pluginPage', 'pluginPage', array($this, 'ebay_keyword_suggest_settings'));
    // But perhaps you meant this? (Note the option name - the second parameter)
    register_setting( 'pluginPage', 'ebay_keyword_suggest_settings', array($this, 'ebay_keyword_suggest_settings'));
  2. Or you made a typo in your get_option() call in your enqueue_localize() function, where you should have used get_option( 'pluginPage' ). But it's unlikely that you would use pluginPage as the name for that option? :)

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