Import META Arrays to ACF Checkbox

Let us assume you have your CSV ready with a meta field “possibilities”. In the CSV row there is a string …,”possibility_1,possibility_2,possibility_3″,…

Add the following to the functions.php:

add_filter('really_simple_csv_importer_save_meta', 'possibilities_to_array', 10, 3);
function possibilities_to_array($meta, $post, $is_update)
{
? ? $values = $meta['possibilities'];
    //string to array
? ? $values = explode(',', $values);
? ? $meta_arr = array();
? ? foreach ($values as $sub) {
        //add each to array
? ? ? ? $meta_arr[] = $sub;
? ? }
? ? $meta['possibilities'] = $meta_arr;
? ? return $meta;
}

Then run the import. Maybe there are some warnings caused by updating the fields but the posts are set with correct choosen ACF Checkboxes.

Hope it helps!