Illuminate\Support\Collection::intersect PHP Method

    public function intersect($items)
    {
        return new static(array_intersect($this->items, $this->getArrayableItems($items)));
    }

 public function testIntersectCollection()
 {
     $c = new Collection(['id' => 1, 'first_word' => 'Hello']);
     $this->assertEquals(['first_word' => 'Hello'], $c->intersect(new Collection(['first_world' => 'Hello', 'last_word' => 'World']))->all());
 }