Error: MySQL shutdown unexpectedly?

Step by step recovery database Xampp

1. Rename folder mysql/data to mysql/data_old

2. Make a copy of mysql/backup folder and name it as mysql/data

3. Copy all your database folders from mysql/data_old into mysql/data (except mysql, performance_schema, and phpmyadmin folders)

4. Copy mysql/data_old/ibdata1 file into mysql/data folder

5. Start MySQL from XAMPP control panel

Reference

1. https://stackoverflow.com/questions/18022809/how-to-solve-error-mysql-shutdown-unexpectedly