tting( 'silvia-related-posts', array( 'default' => 1, 'sanitize_callback' => 'silvia_sanitize_checkbox', ) ); $wp_customize->add_control( 'silvia-related-posts', array( 'label' => esc_html__( 'Show related posts', 'silvia' ), 'section' => 'silvia_post', 'priority' => 15, 'type' => 'checkbox' ) ); // Register related posts image setting $wp_customize->add_setting( 'silvia-related-posts-img', array( 'default' => 1, 'sanitize_callback' => 'silvia_sanitize_checkbox', ) ); $wp_customize->add_control( 'silvia-related-posts-img', array( 'label' => esc_html__( 'Show related posts thumbnail', 'silvia' ), 'section' => 'silvia_post', 'priority' => 17, 'type' => 'checkbox' ) ); } add_action( 'customize_register', 'silvia_post_customize_register' );