How to let user update their daily number


I’m newbie here. I’m trying to create number input field and update button which would like to let user update their daily chanting or praying number. After User updated number, the number will showing the total of chanting/praying (example day 1 user update “55”, day 2 user update “100”, the total will be auto sum at the same page “total praying is 155”. Besides the total of chanting/praying by the user, beside it is the grand total which all members number of total chanting/praying number.

I would like to get help on how to get the features from PHP?

Thank you very much.

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