Replies: 0
Hello there!
I’m getting this warning lately and I don’t know why.
“Warning: Use of undefined constant option_name – assumed ‘option_name’ (this will throw an Error in a future version of PHP) in /homepages/42/d200253459/htdocs/ufp_wordpress/wp-content/plugins/invoice-king-pro/includes/admin_area.php on line 895”
Is there an explanation and solution for this?