A spintax (or simply spinner text) is a specially formatted text that is capable of generating a unique articles (unique combination of words) everytime it is executed and is used popularly as an SEO measure.
SpinerMan is a PHP Class that is capable of processing a spintax and retrieve statistical information like maximum number of variations, holes, minimum and maximum number of words, and much more. It supports nested blocks and parses the input into a tree with details available at every node.
NOTE: This script was written by an unknown JavaScript developer somewhere near 2014, when spintax was a very popular thing. I'm not the original author of this wonderful script. Instead, I have merely converted the script into a PHP class and made it available to the world (thanks to GitHub!).