我正在尝试更新核心WordPress选项，image_default_link_type, 但WordPress拒绝更新它。插件本身注册的选项将更新。下面是一个简单的示例：

add_action( \'init\', \'wpse_register_plugin_settings\' );    
add_action( \'admin_menu\', \'wpse_add_plugin_admin_menu_entry\' );

/**
 * Register a plugin setting.
 */
function wpse_register_plugin_settings() {
    add_settings_field(
        \'my_plugin_settings\',
        __( \'Settings\', \'my-plugin\' ),
        \'wpse_display_settings_field\',
        \'my-plugin-admin-options\',
    );

    register_setting(
        \'my-plugin-admin-options\',
        \'my_plugin_setting\',
    );
}

/**
 * Callback function for the plugin settings section.
 */
function wpse_display_settings_field() {
    require_once plugin_dir_path( \'my-plugin\' ) . \'partials/admin/settings/section-display.php\';
}

/**
 * Add the settings page as an entry in the admin menu.
 */
function wpse_add_plugin_admin_menu_entry() {
    add_options_page(
        __( \'My Plugin Settings\', \'my-plugin\' ),
        __( \'My Plugin\', \'my-plugin\' ),
        \'manage_options\',
        \'my-plugin-setting-page-slug\',
        \'wpse_output_plugin_settings_page\'
    );
}

/**
 * Callback function for the plugin settings page.
 */
function wpse_output_plugin_settings_page() {
    // Check user has permissions.
    if ( ! current_user_can( \'manage_options\' ) ) {
        wp_die(
            \'<h1>\' . esc_html__( \'You need a higher level of permission.\', \'my-plugin\' ) . \'</h1>\' .
            \'<p>\' . esc_html__( \'Sorry, you are not allowed to use the plugin admin settings.\', \'my-plugin\' ) . \'</p>\',
            403
        );
    }

    require_once plugin_dir_path( \'my-plugin\' ) . \'partials/admin/settings/display.php\';
}

目录section-display.php:

<label for="my_plugin_setting">
    <input type="checkbox" name="my_plugin_setting" id="my_plugin_setting" value="1" <?php checked( get_option( \'my_plugin_setting\' ) ); ?> />
    <?php esc_html_e( \'Some setting\', \'my-plugin\' ); ?>
</label>
<br/>
<select name="image_default_link_type">
    <!-- some options -->
</select>

目录display.php:

<?php

/**
 * Plugin settings.
 */
?>
<div class="wrap">
    <h2><?php esc_html_e( \'My Plugin Settings\', \'my-plugin\' ); ?></h2>
    <div>
        <form method="post" action="options.php">
            <?php settings_fields( \'my-plugin-admin-options\' ); ?>
            <?php do_settings_sections( \'my-plugin-admin-options\' ); ?>
            <?php submit_button( esc_html__( \'Save Changes\' ) ); ?>
        </form>
    </div>
</div>

WordPress似乎正在阻止更新设置。如何通过插件的设置页面启用对核心选项的更新？

add_filter( \'allowed_options\', \'wpse_allow_image_default_link_type_update\' );

/**
 * Allow core `image_default_link_type` setting to be updated from the
 * plugin settings page.
 *
 * @global $option_page
 */
function wpse_allow_image_default_link_type_update( $allowed_options ) {
    global $option_page;

    if ( \'my-plugin-admin-options\' === $option_page ) {
        $allowed_options[\'my-plugin-admin-options\'][] = \'image_default_link_type\';
    }

    return $allowed_options;
}