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Collections are a way for you to organize kata so that you can create your own training routines. Every collection you create is public and automatically sharable with other warriors. After you have added a few kata to a collection you and others can train on the kata contained within the collection.
Get started now by creating a new collection.
It's a Draft, it hasn't a Submit button. Only published katas have it.
I just tried a few solutions and had no problems; 106 guys passed the PHP kata. Maybe a CW problem, try later.