WordPress Version: 5.5
/**
* Retrieves the markup for a custom header.
*
* The container div will always be returned in the Customizer preview.
*
* @since 4.7.0
*
* @return string The markup for a custom header on success.
*/
function get_custom_header_markup()
{
if (!has_custom_header() && !is_customize_preview()) {
return '';
}
return sprintf('<div id="wp-custom-header" class="wp-custom-header">%s</div>', get_header_image_tag());
}