What is the significance of implementing Dependency Injection in PHP classes, especially when certain variables are mandatory for specific functionalities?

When certain variables are mandatory for specific functionalities in PHP classes, implementing Dependency Injection is significant because it allows these variables to be passed into the class from the outside, rather than being hardcoded within the class itself. This promotes flexibility, reusability, and testability in the codebase. 

class MyClass {
    private $dependency;

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

    public function doSomething() {
        // Use $this->dependency here
    }
}

// Usage
$dependency = new Dependency();
$myClass = new MyClass($dependency);
$myClass->doSomething();

Keywords

Dependency Injection PHP classes mandatory variables functionalities significance

Related Questions