https://paiza.io/projects/FyUlL-Pid_xJvnKeVzxqjQ?language=php
https://paste2.org/YytvKU5O
https://hackmd.io/s/H1RM5Gr3Jl
https://paiza.io/projects/YYK4cceIzoP7ZVdKkFN5gw?language=php
https://paste2.org/2ZM0nHIK