//栈（后进先出）$stack =new splstack();$stack->push(data1);$stack->push(data2);echo $stack->pop();echo $stack->pop();//队列(先进先出)$queue = new splqueue();$queue->enqueue(aaaaaa);$queue->enqueue(bbbbbb);echo $queue->dequeue();echo $queue->dequeue();//最小堆(从小到大)$heap = new splminheap();$heap->insert(555);$heap->insert(444);echo $heap->extract();echo $heap->extract();//最大堆(从大到小)$maxheap = new splmaxheap();$maxheap->insert(888);$maxheap->insert(999);echo $maxheap->extract();echo $maxheap->extract();//固定长度的数组$array = new splfixedarray(10);$array[0] = 111;$array[8] = 888;var_dump($array);