What are the best practices for accessing objects in linked PHP files without the need for global variables?

When accessing objects in linked PHP files without using global variables, it is best to use dependency injection. This involves passing the required objects as parameters to the functions or methods that need them, rather than relying on global variables. This approach promotes better code organization, improves testability, and reduces coupling between different parts of the code. 

// File1.php

class ClassA {
    public function doSomething(ClassB $classB) {
        // Access ClassB object without using global variables
        $classB->someMethod();
    }
}

// File2.php

class ClassB {
    public function someMethod() {
        // Method implementation
    }
}

// Usage
$classB = new ClassB();
$classA = new ClassA();
$classA->doSomething($classB);

Keywords

namespaces autoloading dependency injection singleton pattern object-oriented programming

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