php – 从数组中访问类变量

发布时间：2020-12-13 16:57:13 所属栏目：PHP教程来源：网络整理

导读：我是 PHP的新手,我无法访问一些类变量. 我有这门课： class emptyClass { private $ladderWinsNoCoin = 0; private $ladderWinsCoin = 0; private $arenaWinsNoCoin = 0; private $arenaWinsCoin = 0; private $ladderLossesNoCoin = 0; private $ladderLoss

我是 PHP的新手,我无法访问一些类变量.

我有这门课：

class emptyClass 
{
  private $ladderWinsNoCoin   = 0;    
  private $ladderWinsCoin   = 0;  
  private $arenaWinsNoCoin   = 0;     
  private $arenaWinsCoin   = 0;       
  private $ladderLossesNoCoin = 0;    
  private $ladderLossesCoin = 0;  
  private $arenaLossesNoCoin = 0;     
  private $arenaLossesCoin = 0;   

  public function getProperty($property) {
        if (property_exists($this,$property)) {
              return $this->$property;
            }
          }

    public function upOne($property) {
        if (property_exists($this,$property)) {
              $this->$property=($property+1);
            }
          }

    public function setProperty($property,$value) {
        if (property_exists($this,$property)) {
          $this->$property = $value;
        }
    }
}

然后我在一个数组中创建它的9个实例

/* Create classes in an array so we can call 
them with strings from the database*/
$classes = array(  
  'Druid'  => new emptyClass,'Hunter' => new emptyClass,'Mage'   => new emptyClass,'Paladin'=> new emptyClass,'Priest' => new emptyClass,'Rogue'  => new emptyClass,'Shaman' => new emptyClass,'Warlock'=> new emptyClass,'Warrior'=> new emptyClass
);

接下来我想增加类变量的值以匹配从数据库获得的数据,这就是我想出的

foreach ($games as $game){               // Go through the games array from the database 
              $gameID = current($game);      // Unused (for now)
           $heroClass = (string)next($game); 
        $villainClass = (string)next($game); // Unused (for now)
                 $win = (int)next($game);
                $coin = (int)next($game);
              $ladder = (int)next($game);

                         //Add up the values in the class objects
               if ($ladder==1&&$coin==1&&$win==1){          // Ladder win with coin
        $classes[$heroClass] -> {upOne($ladderWinsCoin)};
    } else if ($ladder==1&&$coin==1&&$win==0){  // Ladder loss with coin
        $classes[$heroClass] -> {upOne($ladderLossesCoin)}; 
    } else if ($ladder==1&&$coin==0&&$win==1){  // Ladder win without coin
        $classes[$heroClass] -> {upOne($ladderWinsNoCoin)};
    } else if ($ladder==1&&$coin==0&&$win==0){  // Ladder loss without coin
        $classes[$heroClass] -> {upOne($ladderLossesNoCoin)};
    } else if ($ladder==0&&$coin==1&&$win==1){  // Arena win with coin
        $classes[$heroClass] -> {upOne($arenaLossesCoin)};
    } else if ($ladder==0&&$coin==1&&$win==0){  // Arena loss with coin
        $classes[$heroClass] -> {upOne($arenaLossesCoin)}; 
    } else if ($ladder==0&&$coin==0&&$win==1){  // Arena win without coin
        $classes[$heroClass] -> {upOne($arenaWinsNoCoin)};
    } else if ($ladder==0&&$coin==0&&$win==0){  // Arena loss without coin
        $classes[$heroClass] -> {upOne($arenaLossesNoCoin)};
    }

$game是数据库中的数组,看起来像这样

[1,’法师’,’德鲁伊’,1,1]

当它运行时,我得到一个致命的错误

PHP致命错误：在第48行的/home/vooders/public_html/gameReader.php中调用未定义的函数setProperty()

编辑：

所以在尝试重命名getter / setter之后我仍然会遇到致命的错误,所以现在我确定它是如何调用这些对象的.

我会试着通过我的想法来谈谈你

$classes [$heroClass] – > {upOne($ladderWinsCoin)};

如果我们在上面这一行,$heroClass将是这个例子’Mage’中来自数据库的字符串.

现在我想使用这个字符串从$classes数组中调用正确的对象,然后将适当的变量增加1.

解决方法

//it should work now
<?
class emptyClass {
        private $ladderWinsNoCoin   = 5;    private $ladderWinsCoin   = 0;  private $arenaWinsNoCoin   = 0;     private $arenaWinsCoin   = 0;       
        private $ladderLossesNoCoin = 0;    private $ladderLossesCoin = 0;  private $arenaLossesNoCoin = 0;     private $arenaLossesCoin = 0;   

        public function getProperty($property) {
            if (property_exists($this,$property)) {
                  return $this->$property;
                }
              }

        public function setProperty($property,$value) {
            if (property_exists($this,$property)) {
              $this->$property = $value;
            }
        }
         public function upOne($property) {
            if (property_exists($this,$property)) {
                  $this->$property++;
            }
          }
}

$classes = array(
    'Druids'    => new emptyClass,'Elfos'     => new emptyClass
); 
$classes["Druids"]->setProperty("ladderWinsNoCoin",50);
echo $classes["Druids"]->getProperty("ladderWinsNoCoin") . "<br>";

$classes["Druids"]->upOne("ladderWinsNoCoin");
echo $classes["Druids"]->getProperty("ladderWinsNoCoin"). "<br>";

$classes["Elfos"]->setProperty("ladderLossesCoin",25);
echo $classes["Elfos"]->getProperty("ladderLossesCoin"). "<br>";

$classes["Elfos"]->upOne("ladderLossesCoin");
echo $classes["Elfos"]->getProperty("ladderLossesCoin"). "<br>";

//50
//51
//25
//26
?>

（编辑：李大同）

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