MySQL has been used for user registration and login whereas firebase is being user for data maintenance such as user cart , wishlist , placing ording, listing orders etc !
See Gifs below to understand flow of App !
I have attached php files as well as SQL dB Schema how you should create it. :) Try connecting same way with your won dB.
Download Php Files alongwith MySQL db schema
Activate firebase database service and set rules as { "rules": { ".read": true, ".write": true } }
Then import the below attached JSON files to get some dummy data backup JSON backup file
https://magic-print-8db31.firebaseio.com/
Simply because we do not want same dB to hold user as well as product and order data under same umbrella. It can be risky at times.
Log it into Issue Tracker and will give fix soon.
MIT License
Copyright (c) 2018 Kshitij Singh
Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:
The above copyright notice and this permission notice shall be included in all
copies or substantial portions of the Software.
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
SOFTWARE.