Design Pattern in PHP - Speaker Deck

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Design Pattern in PHP Nemanja Marić maki10

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About me ● PHP Developer at Abstract ● Member of PHP Serbia Community ● Co-organizer Laravel Serbia Meetup’s ● Working with PHP since 2014 ● In Laravel world from 2016 ● Open source contributor ● Contributing to the Laravel Framework ● And most !important: Husband and father of two little angels

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Interesting part Share your knowledge with others to get some knowledge.

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Did you know what is new in Laravel 6.8?

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Did you know what is new in Laravel 6.8?

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Over the years

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What will be covered?

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➔ Decorator Pattern ➔ Responsibility Pattern ➔ Adapter Pattern ➔ Strategy Pattern

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Let's start with an easy one Adapter Pattern

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Real life example

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Definition An adapter allows two incompatible interfaces to work together.

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Example Most famous example is a book and e-reader. So let’s dig in.

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Run in terminal

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Ok it’s a start but we miss definition

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Definition An adapter allows two incompatible interfaces to work together.

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Let’s add interface

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Let’s add another one

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We need to create a class to allow that two totally different interface to communicate

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When making adapter key thing is to implement interface that we want to use

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Do you know where we use this on Laravel?

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Strategy Pattern

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Definition Define family of algorithms, encapsulate each one and then make it interchangeable. Leverage polymorphism we are able to swap component in a runtime.

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Leverage polymorphism we are able to swap component in a runtime

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Do you know where we use this on Laravel?

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Responsibility Pattern

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Definition Chain of Responsibility is a behavioral design pattern that lets you pass requests along a chain of handlers. Upon receiving a request, each handler decides either to process the request or to pass it to the next handler in the chain.

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How to be 100% sure that all item in a chain will use our check method?

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But where is a chain? How that will work?

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Do you know where we use this on Laravel?

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Decorator Pattern

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Definition Decorator is a structural design pattern that lets you attach new behaviors to objects by placing these objects inside special wrapper objects that contain the behaviors.

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Number of services (class) could be insane high

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Do you know where we use this on Laravel?

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Questions? Slides: https://speakerdeck.com/maki10 Twitter: https://twitter.com/NemanjaMaki10 All materials for this topic are on Laracast and also can be founded on Youtube.