I have a page that uses javascript for computing inventories.
I use PHP as my server-side language for saving to MySQL.
What is the proper practice when it comes to this situation:
Use only php to compute then save to DB.
Use only javascript to compute then use PHP to save to DB.
Or should I use both to compute? Please help. Thanks
Use javascript for dynamic data calculations or adjustments client side without the need of refreshing the page. This is good if you are wanting to do on the fly calculations quickly in the clients browser
Use php for validating and formatting your data before saving into your MYSQL database. Make sure only send the raw inputs to your php script and do the calculations again with php server-side. Sending the computation result done with JS would be super risky as client side processing is easily manipulable by users.