I have created a radio button field with ACF so that admin can specify a colour. E.g:
I’d like this to be output as a class via <body <?php body_class(); ?> in header.php. Is this possible?
I’m currently outputting the class in header.php like so:
<div id="page" class="site <?php the_field('package_colour',$post->ID); ?>">
Hook into the body_class filter and add your field there. It might be better to get the ID from get_queried_object_id() instead of get_the_ID().
add_filter( 'body_class', 'wpse_20160118__body_class' );
function wpse_20160118__body_class( $classes ) {
if ( $package_colour = get_field( 'package_colour', get_queried_object_id() ) ) {
$package_colour = esc_attr( trim( $package_colour ) );
$classes[] = $package_colour;
}
return $classes;
}