note 115529 added to language.oop5.interfaces

In their book on Design Patterns, Erich Gamma and his associates (AKA: "The Gang of Four") use the term "interface" and "abstract class" interchangeably. In working with PHP and design patterns, the interface, while clearly a "contract" of what to include in an implementation is also a helpful guide for both re-use and making changes. As long as the implemented changes follow the interface (whether it is an interface or abstract class with abstract methods), large complex programs can be safely updated without having to re-code an entire program or module. In PHP coding with object interfaces (as a keyword) and "interfaces" in the more general context of use that includes both object interfaces and abstract classes, the purpose of "loose binding" (loosely bound objects) for ease of change and re-use is a helpful way to think about both uses of the term "interface." The focus shifts from "contractual" to "loose binding" for the purpose of cooperative development and re-use. ---- Server IP: 72.52.91.14 Probable Submitter: 32.208.9.227 ---- Manual Page -- http://php.net/manual/en/language.oop5.interfaces.php Edit -- https://master.php.net/note/edit/115529 Del: integrated -- https://master.php.net/note/delete/115529/integrated Del: useless -- https://master.php.net/note/delete/115529/useless Del: bad code -- https://master.php.net/note/delete/115529/bad+code Del: spam -- https://master.php.net/note/delete/115529/spam Del: non-english -- https://master.php.net/note/delete/115529/non-english Del: in docs -- https://master.php.net/note/delete/115529/in+docs Del: other reasons-- https://master.php.net/note/delete/115529 Reject -- https://master.php.net/note/reject/115529 Search -- https://master.php.net/manage/user-notes.php