metalhead84

I am creating a football predictor game and have a table in the database to hod all my users i have written a query to pull all out the users that have made a prediction that day with their predictions made i have put this into an array so my array will hold all the user details 1 being their userId I have set the order by on the query to userId so I get all the same users predictions in 1 block. I now want to extract all the predictions for each user and put these into their own array but I don't know which users the array will hold, how many users their will be, or how many predictions each user would have made so i'm not sure how to create this array i'm quite new to php can anyone help me with this