...an RPC protocol is a huge error according to the designer of HTTP 1.1 (and inventor of REST): http://www.ics.uci.edu/~fielding/pubs/dissertation/evaluation.htm#sec_6_5_2 share | improve this answer...

... additional information. Even Erich Gamma, one of the Singleton pattern's inventors, doubts this pattern nowadays: "I'm in favor of dropping Singleton. Its use is almost always a design smell" Further reading How is testing the registry pattern or singleton hard in PHP? What are the disadva...