The package provides a LaTeX document class for writing a PhD thesis. The author developed it while writing his PhD thesis in School of Computing (SoC), National University of Singapore (NUS). By default, the class adheres to the NUS Guidelines on Format of Research Thesis Submitted For Examination. However, the class for conformation to a different guideline should not be difficult.
For help and advice, the best place to raise an issue is on the package's Github repository. Alternatively, you can use the comment form on the author's page.
License: SPhdThesis is released under public domain. You are free to use, modify, and distribute it as you wish.