Based on Observer design patterns, Event Driven can be used to implement several abstract scripts for processing events and registering event listerers. It manages the processing of abstract evens that may occuring during the execution of a script. This free PHP script may be extended by scripts to handle application specific concrete event handlers.

Observerable is created to define an observer design patterns interface, the observer interface will be used to define a function for observer classes which is called when observed objects are updated. There's another class in this script to be responsible for keeping track of all observer object. It can add and remove observer objects and notify the observers when the ...