SPL标准类库

栈

$stack = new SplStack();
$stack->push("data1\n");   //入栈
$stack->push("data2\n");

echo $stack->pop();
echo $stack->pop(); //出栈

队列

$queue= new SplQueue();
$queue->enqueue("data1\n");
$queue->enqueue("data2\n");


echo $queue->dequeue();
echo $queue->dequeue();

堆

$heap = new SplMinHeap();
$heap->insert("data1\n");
$heap->insert("data2\n");

echo $heap->extract();
echo $heap->extract();

固定长度的数组

$array = new SplFixedArray(10);
$array[0] = 123;
$array[9] = 456;
var_dump($array);