XPSPL requires >= PHP 5.4.
XPSPL is installed using (composer).
require: "prggmr/xpspl": "v5.0.0"
Once installed XPSPL’s API will be available after including composer’s vender/autoload.php.
This is the legacy installation method.
Only install XPSPL using this if you are using XPSPL < v5.0.0
The manual installation is over the network with a CLI. (link)
The installation requires the CURL and ZIP libraries to be installed on the system and is the legacy installation.
curl -s https://raw.github.com/prggmr/xpspl/master/install | sudo sh