What are the key differences in behavior between WeakRef extension and a custom WeakRef implementation?

The key differences in behavior between WeakRef extension and a custom WeakRef implementation lie in their performance and compatibility. The WeakRef extension is a built-in feature in PHP that provides a more optimized and efficient way to create weak references, while a custom WeakRef implementation may offer more flexibility and customization options. Developers should choose between the two based on their specific requirements and performance considerations. 

// Using WeakRef extension
$weakRef = WeakRef::create($object);

// Custom WeakRef implementation
class CustomWeakRef {
    private $ref;

    public function __construct($object) {
        $this->ref = new WeakReference($object);
    }

    public function get() {
        return $this->ref->get();
    }
}

$customWeakRef = new CustomWeakRef($object);

Keywords

WeakRef extension custom WeakRef implementation behavior differences PHP memory management

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