PHPDoc
PHPDoc is an adaptation of Javadoc for the PHP programming language. It is still an informal standard for commenting PHP code, but it is in the process of being formalized. It allows external document generators like phpDocumentor, which is the de facto standard implementation, to generate documentation of APIs and helps some IDEs such as Zend Studio, NetBeans, JetBrains PhpStorm, ActiveState Komodo Edit and IDE, PHPEdit and Aptana Studio to interpret variable types and other ambiguities in the loosely typed language and to provide improved code completion, type hinting and debugging.
PHPDoc supports documentation of both object-oriented and procedural code.
On August 13, 2013 the PHP Framework Interoperability Group began writing a formal specification for PHPDoc.
