How to initialize $wpdb?
I have a .php page in the theme root to check the data of one CUSTOM form.
After receiving this data I need to do a query in a custom mysql table, so I need $wpdb, but I can’t use it directly (or doing
global $wpdb) because it is a phisical .php file, so the rewrite rule will not affect the request (the request is not passed to index.php because the file exists).
So In this case how can I create an object $wpdb?