It does so by enumerating a shared set of rules and expectations about how to format PHP code.[6] N/A N/A N/A Accepted[4] PSR-3 Logger Interface It describes a common interface for logging libraries.[7] Jordi Boggiano N/A N/A Accepted[4] PSR-4 Autoloading Standard It describes a specification for autoloading classes from file paths. It is fully interoperable, and can be used in addition to any other autoloading specification, including PSR-0. This PSR also describes where to place files that will be auto loaded according to the specification.[8] Paul M. Jones Phil Sturgeon Larry Garfield Accepted[4] PSR-5 PHPDoc Standard The main purpose of this PSR is to provide a complete and formal definition of the PHPDoc standard.