apply_filters( 'learndash_purchase_invoice_filename', string $filename, int $post_id, string|float $file_time, int $user_id )
Filters the purchase invoice upload file name.
apply_filters( 'learndash_purchase_invoice_filename', string $filename, int $post_id, string|float $file_time, int $user_id )
Filters the purchase invoice upload file name.