As an example, this will set the post title on save or update from input fields.
<?php // SET TITLE ON SAVE & UPDATE
function my_post_title_updater($post_id) {
if ( get_post_type( $post_id ) == 'account' ) {
$my_post = array(
'ID' => $post_id,
'post_title' => get_field( 'last_name', $post_id ) . ', ' . get_field( 'first_name', $post_id ),
);
wp_update_post( $my_post );
}
}
add_action('acf/save_post', 'my_post_title_updater', 20); // run after ACF saves the $_POST['fields'] data
?>
