因此，这里似乎有两个问题：首先，您似乎没有建立像下面这样的WP\\u Customize\\u控件的新实例，而且重要的是要记住，您必须至少为设置和控件提供最小数组项，否则它将不会显示，您在设置中有一个空数组。

您还想确保您的命名约定不是以数字开始的，所以我在下面将它们切换了。

以下是您可以尝试的代码更改：

add_action(\'customize_register\', \'homepage_sections\');
//products
function homepage_sections($wp_customize){
    $wp_customize->add_panel(
        \'homepage_sections\', 
        array(
            \'title\'             => \'Homepage Sections\',
            \'priority\'          => \'20\'
        )
    );
    $wp_customize->add_section(
        \'homepage_settings_section\', 
        array(
            \'title\'             =>  \'Homepage settings\',
            \'panel\'             =>  \'homepage_sections\',
        )
    );
    $wp_customize->add_setting(
        \'homepage_settings_setting\', 
        array(
            \'default\'           =>  1
        )
    );
    $wp_customize->add_control(
       new WP_Customize_Control(
          \'homepage_settings_control\', 
           array(
              \'section\'           =>  \'homepage_settings_section\',
              \'settings\'          =>  \'homepage_settings_setting\',
              \'label\'             =>  \'Number of sections\',
              \'description\'       =>  \'Number of sections in homepage\',
              \'type\'              =>  \'number\'
           )
        )
    );


    global $wpdb;
    $sections=$wpdb->get_results(\'SELECT section_id, section_title FROM vt_homepage_sections;\');

    foreach($sections as $key) :
        $section_id=$key->section_id;
        $cust_setting_id = \'setting_\' . $section_id;
        $cust_control_id = \'control_\' . $section_id;


        $wp_customize->add_setting(
            $cust_setting_id,
            array(
                \'default\'   => \'\',
                \'transport\' => \'refresh\',
            )
        );
        $wp_customize->add_control(
            new WP_Customize_Control(
                $cust_control_id,
                array(
                    \'settings\'          =>  $cust_setting_id,
                    \'section\'           =>  \'homepage_settings_section\',
                    \'label\'             =>  \'test Control\'
                )
            )
        );
    endforeach;
}