创建扩展数组的PHP集合类

Question

我正在编写一个包含其他对象集合的类。我将创建一个方法将集合中的元素从一个位置移动到另一个位置，另一个用于确定已更改的内容等。

不是从头开始，是否有一些我应该扩展的预建类？我希望我应该使用spl，但我对PHP的这一部分很新，并且不确定从哪里开始。我最近遇到class.arrayobject，但似乎没有扩展的内容。

class Collection
{
    protected $stack=[];
    private $originalStack;

    public function __construct(array $nodes=[]) { //$nodes is an array of Node objects
        $this->stack=$nodes;
        $this->originalStack=array_merge(array(), $nodes);    //Arrays not passed by reference but the objects are!
    }

    public function getChanges(){
        $this->stack;
    }

    public function getPositionChanges($prop){
        return array_udiff_assoc($this->stack, $this->originalStack,
            function ($stack, $originalStack) {
                return is_numeric($stack->$prop) && is_numeric($originalStack->$prop)
                ?$stack->$prop - $originalStack->$prop
                :strcmp($stack->$prop, $originalStack->$prop);
            }
        );
    }

    public function getAll(){
        $this->stack;
    }

    public function getByPosition(int $position){
        $this->stack[$position];
    }

    public function getPropertyByPosition(int $position, $property){
        return $this->stack[$position]->$property;  //Uses __get
    }

    public function add(Node $elem){
        $this->stack[]=$elem;
    }

    public function delete(int $position){
        if(!isset($this->stack[$position])) throw new CollectionException('Index does not exist');
        unset($this->stack[$position]);
        $this->stack=$stack[]=array_values($this->stack);
    }

    public function move(int $initialPosition, int $finalPosition){
        if(!isset($this->stack[$initialPosition]) || !isset($this->stack[$finalPosition])) throw new CollectionException('Index does not exist');
        $node=$this->stack[$initialPosition];
        unset($this->stack[$initialPosition]);
        array_splice($this->stack, $finalPosition, 0, $node);
        $this->stack=array_values($this->stack);
        //?? return $this->stack;
    }

    public function update(int $position, $property, $value){
        if(!isset($this->stack[$position])) throw new CollectionException('Index does not exist');
        $this->stack[$position]->$property=$value;  //Uses __set
    }
}