形成内部循环无法正常工作

Question

在过去的几天里，我只是尝试并尝试解决这个问题，但我真的不知道如何处理它。

我有这个inventory.php 用于我正在尝试制作的游戏。 Inventory 类有效，其中的方法也有效。 我的问题是表单循环，因为我不知道如何使它正常工作。我希望按钮适用于每个项目，但有些东西搞砸了，它只适用于第二个（一个或最后一个）。不管我按下哪个按钮，第二个按钮都是金色的。

我知道代码很乱，我确信它可以更容易地制作，但我正在尝试解决这个问题。

代码：

<?php 
if (isset($_SESSION['id'])) {

    /**
    * Inventory
    */
    class Inventory
    {
        public $dbh;
        public $id;
        public $id_item;
        public $equip;
        public $strength;
        public $endurance;
        public $intelligence;
        public $luck;
        public $dexterity;
        public $gold;    
        public $gold_sell;


        function __construct(PDO $dbh, $id, $id_item, $equip, $strength, $endurance, $intelligence, $luck, $dexterity, $gold, $gold_sell)
        {
            $this->dbh = $dbh;
            $this->id = $id;
            $this->id_item = $id_item;
            $this->equip = $equip;
            $this->strength = $strength;
            $this->endurance = $endurance;
            $this->intelligence = $intelligence;
            $this->luck = $luck;
            $this->dexterity = $dexterity;
            $this->gold = $gold;
            $this->gold_sell = $gold_sell;
        }

        function PrintDetails(){
            print "Id:".($this->id)."<br>";
            print "Id Item:".($this->id_item)."<br>";
            print "Equip:".($this->equip)."<br>";
            print "Strength:".($this->strength)."<br>";
            print "Endurance:".($this->endurance)."<br>";
            print "Intelligence:".($this->intelligence)."<br>";
            print "Luck:".($this->luck)."<br>";
            print "Dexterity:".($this->dexterity)."<br>";
            print "User gold:".($this->gold)."<br>";       
            print "Sale price:".($this->gold_sell)."<br>";
        }

        function SellItem(PDO $dbh, $id_item, $gold, $gold_sell){

            $this->gold = $this->gold + $this->gold_sell;

            print "GOLD :".($this->gold)."<br>";
                $sth = $dbh->prepare("UPDATE attributes SET gold = :gold WHERE id = :id");
                $sth->bindParam(":gold", $this->gold);
                $sth->bindParam(":id", $_SESSION['id']);
                $sth->execute();


                        print "iditr :".($this->id_item)."<br>";
            // $inventory->SellItem($dbh, $row2['id_item'],$row3['gold'],$row4['gold_sell']); }


        }
    }

    $sth = $dbh->prepare("SELECT id, username FROM user WHERE id = ".$_SESSION['id']."");
    $sth->execute();
    $row = $sth->fetch(PDO::FETCH_ASSOC);

    $sth3 = $dbh->prepare("SELECT * FROM attributes WHERE id = ".$_SESSION['id']."");
    $sth3->execute();
    $row3 = $sth3->fetch(PDO::FETCH_ASSOC);



    $sth2 = $dbh->prepare("SELECT * FROM inventory WHERE id = ".$_SESSION['id']."");
    $sth2->execute();

    while ($row2 = $sth2->fetch(PDO::FETCH_ASSOC)){
            $sth4 = $dbh->prepare("SELECT * FROM items WHERE id = ".$row2['id_item']."");
    $sth4->execute();



    $row4 = $sth4->fetch(PDO::FETCH_ASSOC);
    print $row2['id'];
    print $row2['username'];
    print $row2['name']."<br>";
    $inventory = new Inventory($dbh,$row['id'],$row2['id_item'],$row2['equip'],$row4['strength'],$row4['endurance'],$row4['intelligence'],$row4['luck'],$row4['dexterity'],$row3['gold'],$row4['gold_sell']);
    $inventory->PrintDetails();
 $inventory->SellItem($dbh,$row2['id_item'],$row3['gold'],$row4['gold_sell']);

?>
<form id='<?php echo $row2["id_item"]; ?>' name="submit"  action="" method="POST">
    <button type='submit' value='<?php echo $row2['id_item']; ?>'>Add</button>
</form>


<?php

}

}

如果我查看我的来源，就会出现这种情况：

<div id="main">

2motocDagger
    <br></br>
      Id:2
    <br></br>
      Id Item:1
    <br></br>
      Equip:0
    <br></br>
      Strength:10
    <br></br>
      Endurance:6
    <br></br>
      Intelligence:0
    <br></br>
      Luck:0
    <br></br>
      Dexterity:3
    <br></br>
      User gold:202
    <br></br>
      Sale price:5
    <br></br>
      GOLD :207
    <br></br>
      iditr :1
    <br></br><form id="1" method="POST" action="" name="submit"><button value="1" type="submit">
      Add
    </button></form>



2motocStaff
    <br></br>
      Id:2
    <br></br>
      Id Item:2
    <br></br>
      Equip:0
    <br></br>
      Strength:4
    <br></br>
      Endurance:5
    <br></br>
      Intelligence:12
    <br></br>
      Luck:0
    <br></br>
      Dexterity:4
    <br></br>
      User gold:202
    <br></br>
      Sale price:4
    <br></br>
      GOLD :206
    <br></br>
      iditr :2
    <br></br><form id="2" method="POST" action="" name="submit"><button value="2" type="submit">
      Add
    </button></form></div>

表单 ID 不同，所以这不是问题。 如果我单击第一个按钮，我的数据库中的金币将更新为 4 金币，我想让每个按钮都能正常工作。5 金币我想更新（匕首的金币）。我怎样才能做到这一点？

很抱歉我发了这么大的帖子。 谢谢

Answer 1

请这样尝试：

<form id='f1' method="POST" action="[setup an url here]" >
<input type="hidden" name="refid" value="1" />
<input type="submit" name="submit" value="Add" />
</form>

然后像这样要求提交：

if(isset($_POST['submit'])) {
    $refid = intval($_POST['refid']);
    // do what you want here..
}