add_section('bookCollection_logo_section', array( 'title' => __('Logo', 'BookCollection'), 'priority' => 30, 'description' => __('Upload a custom logo', 'BookCollection'), )); // Add Setting $wp_customize->add_setting('bookCollection_logo', array( 'default' => '', 'transport' => 'refresh', 'sanitize_callback' => 'esc_url_raw', )); // Add Control $wp_customize->add_control(new WP_Customize_Image_Control($wp_customize, 'bookCollection_logo', array( 'label' => __('Upload Logo', 'BookCollection'), 'section' => 'bookCollection_logo_section', 'settings' => 'bookCollection_logo', ))); } add_action('customize_register', 'bookCollection_customize_register');