What are the differences between vererbung and Abhängigkeit in PHP classes?

In PHP classes, "Vererbung" refers to inheritance, where a child class can inherit properties and methods from a parent class. On the other hand, "Abhängigkeit" refers to dependency, where a class relies on another class or external code to function properly. Inheritance promotes code reusability and allows for creating a hierarchy of classes, while dependency injection helps in decoupling classes and making them more testable and maintainable. 

// Example of inheritance (Vererbung)
class ParentClass {
    protected $property;

    public function __construct($property) {
        $this->property = $property;
    }
}

class ChildClass extends ParentClass {
    public function getProperty() {
        return $this->property;
    }
}

// Example of dependency injection (Abhängigkeit)
class Dependency {
    public function doSomething() {
        return 'Doing something';
    }
}

class MyClass {
    private $dependency;

    public function __construct(Dependency $dependency) {
        $this->dependency = $dependency;
    }

    public function useDependency() {
        return $this->dependency->doSomething();
    }
}

$dependency = new Dependency();
$myClass = new MyClass($dependency);
echo $myClass->useDependency();

Keywords

vererbung Abhängigkeit PHP classes inheritance dependency

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