php design-patterns observer-pattern visitor-pattern strategy-pattern builder-pattern abstract-factory-pattern adapter-pattern singleton-pattern bridge-pattern decorator-pattern prototype-pattern mediator-pattern proxy-pattern flyweight-pattern factory-method-pattern chain-of-responsibility-pattern interpreter-pattern iterator-pattern momento-pattern

php php7 oop design-patterns observer-pattern oop-principles command-pattern adapter-pattern gang-of-four bridge-pattern software-design gof-patterns mediator-pattern memento-pattern interpreter-pattern