Reply To: Share Field Values Across Pages

• Kevin Pliester

• April 7, 2018 at 11:02 am

// current post
global $post;

// args for query
$query_args = array(
	'post_type' => 'performers', // performers post_type (or use WP_User_query  for users)
	'meta_query' => array(
		array(
			// performers match field slug
			'key' => 'event_id', // field slug acf (use post object field and return id)
			'value' => $post->ID // current post id
		)
	)
);

// set wp  query
$query = new WP_Query( $query_args );

// query have posts
if( $query->have_posts() ):

	// loop posts (performers)
	while( $query->have_posts() ): $query->the_post();

		// update fields you like
		// field_slug, field_value, current perfomers id
		update_field( 'YOUR_FIELD_SLUG', 'YOU_FIELD_VALUE', get_the_ID() );

	// end loop
	endwhile;

	// reset query
	wp_reset_postdata();

// end
endif;

I do not know if I understood you correctly, but I’m thinking (depending on your own needs) that you should reach your goal.

You can also put that into a function and then use it the way you need it everywhere.

If you want to do this via / wp-admin, you should look at acf/save_post and combine it.

usefull links:
WP_Query
WP_User_Query
acf/save_post