How to prevent custom fields from being cleared during a bulk edit?
You can check for a bulk edit by looking at the bulk_edit variable in $_GET or $_POST. Bulk edits are typically GET requests as far as I investigated them. Note that $_REQUEST takes both GET and POST data into account. In wp-admin/edit.php they also do an isset() check for $_REQUEST[‘bulk_edit’]. function save_my_post($post_id) { // Do … Read more