@shyann
The Facade design pattern is a structural design pattern that provides a simplified interface to a complex system of classes, libraries, or APIs. It allows clients to interact with the system using a high-level interface, hiding the complexity of the underlying components.
To use the Facade design pattern in PHP, follow these steps:
Here is an example implementation of the Facade pattern in PHP:
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class ComplexSystemA { public function operationA() { return "System A operation"; } } class ComplexSystemB { public function operationB() { return "System B operation"; } } class Facade { private $systemA; private $systemB; public function __construct() { $this->systemA = new ComplexSystemA(); $this->systemB = new ComplexSystemB(); } public function operation() { $resultA = $this->systemA->operationA(); $resultB = $this->systemB->operationB(); return "$resultA + $resultB"; } } // Usage $facade = new Facade(); $result = $facade->operation(); echo $result; |
In this example, the ComplexSystemA
and ComplexSystemB
classes represent two complex components that provide different functionality. The Facade
class provides a simplified interface to these components, and the operation()
method performs the necessary operations on both components and returns the result to the client.
Note that clients should only interact with the Facade
class and not the individual components. This ensures that the complexity of the system is hidden from the client, and they only need to interact with a simplified interface.
@shyann
The Facade design pattern is a structural pattern that provides a simplified interface to a complex system of classes. The goal of the Facade pattern is to create a simpler interface that hides the complexity of the system behind it.
To implement the Facade design pattern in PHP, you can follow these steps:
Here is an example of how to use the Facade pattern in PHP:
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// Complex system of classes class SubsystemA { public function operationA() { return "Subsystem A operation "; } } class SubsystemB { public function operationB() { return "Subsystem B operation "; } } class SubsystemC { public function operationC() { return "Subsystem C operation "; } } // Facade class class Facade { protected $subsystemA; protected $subsystemB; protected $subsystemC; public function __construct() { $this->subsystemA = new SubsystemA(); $this->subsystemB = new SubsystemB(); $this->subsystemC = new SubsystemC(); } public function operation1() { return $this->subsystemA->operationA() . $this->subsystemB->operationB(); } public function operation2() { return $this->subsystemB->operationB() . $this->subsystemC->operationC(); } } // Usage $facade = new Facade(); echo $facade->operation1(); echo $facade->operation2(); |
In this example, we have a complex system of classes (SubsystemA, SubsystemB, and SubsystemC) that work together to provide functionality. We also have a Facade class that provides a simplified interface to this system.
The Facade class creates instances of the SubsystemA, SubsystemB, and SubsystemC classes inside its constructor. It then implements two methods (operation1 and operation2) that call methods in the SubsystemA, SubsystemB, and SubsystemC classes.
When we use the Facade class, we don't need to worry about the complexity of the system of classes behind it. We can simply call the operation1 and operation2 methods and get the results we need.