It was soft rejected because “Items that require PHP should be submitted to the PHP Scripts category”.
You should upload your item to the PHP scripts category as per the reviewer, or make the item work without PHP.
Thanks for your reply!
Suppose I decided to change the category. Should I delete the current hidden item and submit a new item OR there is a simpler solution?
edit the item and change the category
Editing page contains no option to change category. That’s why I ask if there is better solution than “delete and resubmit”.
My Swift Box plugin has got a single php file required by Twitter.
However it is a single file and is not essential for the plugin to work.
Many thanks to all! I got the answer to the main question.