Reply To: acf/upload_prefilter – for every field on options page

• John Huebner

• February 20, 2018 at 5:28 am

Usually, when I want to target a lot of fields with the same filter it’s something like

$fields = array(
  'field_123456',
  'field_234567',
  // etc for each field
);
foreach ($fields as $field_key) {
  add_filter('acf/upload_prefilter/key='.$key, 'my_upload_prefilter');
}

function my_upload_prefilter($errors) {
  // filter function code
}

You probably don’t want to use anonymous functions like your first example. but you probably could.