Installing manually
No installer available for your platform? Did the installer fail? It is not your taste? YOLO? DIY!
Getting PHP for your server
Getting PocketMine-MP
Create a new directory for PocketMine-MP.
Download PocketMine-MP.phar (Downloads)
Rename the .phar to
PocketMine-MP.phar
.Place it in the PocketMine-MP directory you just created.
Get the start script for your platform (Windows, Linux/MacOS bash)
(Linux/MacOS only) Make start.sh executable (chmod +x start.sh)