Php 反复将数组序列化为$\u POST

我正在练习玩21点游戏，我一直坚持打两次。这是我的密码：

if (empty($_POST)) {
  for ($i=0; $i<2; $i++) {
    $pHand[] = array_shift($deck);
    $dHand[] = array_shift($deck);
  }
  $deck2 = serialize($deck);
  $pHand2 = serialize($pHand);
  $dHand2 = serialize($dHand);
}


elseif ($_POST['hit'] == "Hit") {
  $deck = unserialize($_POST['deck']);
  $pHand = unserialize($_POST['pHand']);
  $dHand = unserialize($_POST['dHand']);
  $pHand[] = array_shift($deck);
  $deck2 = serialize($pHand);
  $pHand2 = serialize($dHand);
  $dHand2 = serialize($deck);
}


<form method="post">
<input type="hidden" name="pHand" value="<?php echo htmlspecialchars($pHand2, ENT_QUOTES, 'UTF-8'); ?>">
<input type="hidden" name="dHand" value="<?php echo htmlspecialchars($dHand2, ENT_QUOTES, 'UTF-8'); ?>">
<input type="hidden" name="deck" value="<?php echo htmlspecialchars($deck2, ENT_QUOTES, 'UTF-8'); ?>">

if（空（$\u POST））{
对于（$i=0；$i请考虑使用$\u会话在提交之间存储数据服务器端

大致如下：

<?php
session_start();

if (empty($_POST)) 
{
  for ($i=0; $i<2; $i++) 
  {
    $pHand[] = array_shift($deck);
    $dHand[] = array_shift($deck);
  }

  $_SESSION['deck']  = $deck;
  $_SESSION['pHand'] = $pHand;
  $_SESSION['dHand'] = $dHand;
}
elseif ($_POST['hit'] == "Hit") 
{
  $deck    = $_SESSION['deck'];
  $pHand   = $_SESSION['pHand'];
  $dHand   = $_SESSION['dHand'];
  $pHand[] = array_shift($deck);
  $_SESSION['deck']  = $deck;
  $_SESSION['pHand'] = $pHand;
  $_SESSION['dHand'] = $dHand;
}

我已经试过了，但问题是如果我按两次“Hit”，会话将添加太多的数组。很抱歉，代码不是“开箱即用”的。请将$\u SESSION superglobal变量视为在请求之间可用的变量（只要在每个请求开始时调用SESSION\u start（））.谢谢你的建议，我已经试过了，但仍然卡住了。我会继续尝试的