Tag: Observer Pattern

15 Top Web Application Design Patterns with Real Examples

Web application design patterns are a set of guidelines for designing web applications that help developers create applications that are easy to use, maintain, and scale. These patterns are based on best practices and common solutions to common problems that developers face when building web applications. By following these patterns, developers can ensure that their applications are consistent, reliable, and scalable. Web App Design Patterns There are many different types of web application design patterns, including user interface patterns, architectural patterns, and behavioral patterns. User interface patterns focus on the design of the user interface, such as the layout, navigation, and interaction elements. Architectural patterns focus on the overall structure of the application, such as the separation of concerns and the organization of code. Behavioral patterns focus on how the application responds to user input and other events, such as error handling and data validation. At their core, web application…

read more

Using the Observer Design Pattern | PHP Code Examples in 2023

Using the Observer Pattern in PHP The observer pattern is a behavioral design pattern that defines a one-to-many relationship between objects such that when the state of an object (publisher) changes, the other objects (subscribers) are notified. Article Highlights The observer pattern has a publisher object which updates all its subscribers when its state changes. Benefits -  A change in the state of one entity is propagated to other entities. Con - Sends updates in a random order which can be detrimental if observers have shared data dependency where sequence matters. Observer Design Pattern PHP Code Example <?php interface Publisher { public function registerDisplay($display); public function removeDisplay($display); public function updateDisplays(); } interface Observer { public function update($sportsNews, $politicsNews, $weatherNews); } /* This class represents the publisher class now. NewsData implements publisher and also has an array of references to the subscriber objects. */ class NewsData implements Publisher { private $displays;…

read more