Options in the admin page for a plugin

I’ve been learning about Plugin development using lynda.com. For simplicity and ease of checking I’ve put all the code in a single plugin file which has been successfully activated. I have spent over a day repeatedly going over the course chapters and checking everything but I just can’t get this to display anything on the settings page other than the title and the submit button, which when I press says ERROR: options page not found.

Can anyone please tell me what I am missing or where I have gone wrong. Thanks.

<?php
/**
* Plugin Name: MyPlugin
* Plugin URI:
* Description: Test Plugin.
* Version: 1.0
* Author:
* Author URI:
* License: GPL v2+
* License URI: https://www.gnu.org/licenses/gpl-2.0.html
* Text Domain: myplugin
* Domain Path:
*/
if (!defined('ABSPATH')) exit;

function myplugin_add_sublevel_menu() {

  add_submenu_page(
    'options-general.php',
    'MyPlugin Settings',
    'My Plugin',
    'manage_options',
    'myplugin',
    'myplugin_display_settings_page'
  );
}
add_action('admin_menu','myplugin_add_sublevel_menu');

function myplugin_display_settings_page() {
?>
<div class="wrap">
  <h1><?php echo esc_html(get_admin_page_title()); ?></h1>
  <form action="options.php" method="post">
    <?php
    // output security fields
    settings_fields('myplugin_options');
    // output setting Sections
    do_settings_sections('myplugin');
    //submit button
    submit_button();
    ?>
  </form>
</div>
<?php
}

// register plugin settings
function myplugin_register_settings() {

  register_setting(
    'myplugin_options',
    'myplugin_options',
    'myplugin_validate_options'
  );

  add_settings_section(
    'myplugin_page',
    'MyPlugin Page Settings',
    'myplugin_callback_section_page',
    'myplugin'
  );

  add_action('admin_init','myplugin_register_settings');
}

function myplugin_validate_options($input) {
  // validate options

  return $input;
}

function myplugin_callback_section_page() {
  echo '<p>This section enables various pages to be re-configured.</p>';
}

?>

• This topic was modified 6 years, 1 month ago by Jan Dembowski.
• This topic was modified 6 years, 1 month ago by Jan Dembowski.