CODE EXAMPLE FOR PHP

wp_customize_image_control

$wp_customize->add_setting( 'logo', array(
    'capability'        => 'edit_theme_options',
    'default'           => '',
    'sanitize_callback' => 'ic_sanitize_image',
) );
$wp_customize->add_control( new WP_Customize_Image_Control( $wp_customize, 'logo',
    array(
        'label'    => __( 'Logo', 'text-domain' ),
        'section'  => 'general',
        'settings' => 'logo',
    )
) );