Php 从数组访问类变量
我是PHP新手,访问某些类变量时遇到问题 我有这门课:Php 从数组访问类变量,php,Php,我是PHP新手,访问某些类变量时遇到问题 我有这门课: class emptyClass { private $ladderWinsNoCoin = 0; private $ladderWinsCoin = 0; private $arenaWinsNoCoin = 0; private $arenaWinsCoin = 0; private $ladderLossesNoCoin = 0; private $
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*/
$classes = array(
'Druid' => new emptyClass,
'Hunter' => new emptyClass,
'Mage' => new emptyClass,
'Paladin'=> new emptyClass,
'Priest' => new emptyClass,
'Rogue' => new emptyClass,
'Shaman' => new emptyClass,
'Warlock'=> new emptyClass,
'Warrior'=> new emptyClass
);
接下来,我想增加类变量的值,以匹配从数据库获得的数据,这就是我想到的
foreach ($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($arenaLossesNoCoin)};
}
其中,$game
是数据库中的一个数组,如下所示
[1,‘法师’、‘德鲁伊’、1、0、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\u html/gameReader.PHP中调用未定义的函数setProperty()
编辑:
因此,在尝试重命名getter/setter之后,我仍然会遇到致命的错误,所以现在我确定这就是我调用对象的方式
我会试着把我的想法告诉你
$classes[$heroClass]->{upOne($ladderWinsCoin)}代码>
如果我们使用上面的这一行,$heroClass
将是本例中数据库中的一个字符串'Mage'
现在我想使用这个字符串从$classes
数组中调用右对象,然后将相应的变量增加1 //现在应该可以用了
//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 $classes["Elfos"]->getProperty("ladderLossesCoin"). "<br>";
//50
//51
//25
//26
?>
毫无疑问,我建议您不要“在了解类业务的类外部编写代码。”
“我是一个班级。因此,我还活着。告诉我发生了什么事,我会做出相应的反应。问我你想知道什么,我会给你答案。但是:不要插手班级事务,因为你很脆,加上伍斯特沙司味道很好!!”
(1) 不要“从外部”对类的变量指手画脚。告诉类发生了什么,它可能会增加或减少自己的属性。(你说过他们是私人的,不是吗?他们应该是这样的。)
(2) 如果您想知道“答案”,根据简单或复杂的逻辑,答案可能基于一个或多个属性的值,那么类应该包含该逻辑,因为它属于“自身”。\u set
和\u get
是。根据文档-的规定,除非您想要与这些名称相关联的神奇功能,否则您的任何类中都不能有具有这些名称的函数。
。你明确地给他们打电话,可能是错的。尝试将它们重命名为其他名称。这对于处理您正在处理的多个属性也可能很有用。为此干杯,您是对的!我制作了一个类函数来增加值。不确定为什么我没有开始,但我仍然在调用对象开始时遇到相同的问题。尝试重命名具有相同效果的函数,因此我调用的对象是错误的,我想非常感谢!这就是我做错的地方。我传递的变量是$ladderWinsCoin
,而不是字符串'ladderWinsNoCoin'
,再次感谢