Shulou(Shulou.com)06/03 Report--

Editor to share with you how to use PHP to achieve observer mode, I believe that most people do not know much about it, so share this article for your reference, I hope you can learn a lot after reading this article, let's learn about it!

The Observer pattern provides you with another way to avoid tight coupling between components. The pattern is simple: an object makes itself observable by adding a method that allows another object, that is, the observer to register itself. When the observable object changes, it sends a message to the registered observer. The actions performed by these observers using this information are independent of the observable object. The result is that objects can talk to each other without having to know why.

A simple example is a list of users in the system. The following code displays a list of users that sends a message when a user is added. When you add a user, you can observe this list through the log watcher who sent the message.

Welcome to subscribe "Shulou Technology Information " to get latest news, interesting things and hot topics in the IT industry, and controls the hottest and latest Internet news, technology news and IT industry trends.