在通过__set($propertyName,$value)设置private成员属性时，
用$this->$propertyName = $value的写法才可以进行private变量值的修改,
采用$this->propertyName = $value的写法则不能进行变量值的修改。
完整代码:
class BasePerson{
<code> private $name; private $age; private $average; function __construct(){ $num_args = func_num_args(); if($num_args == 1){ $this->name = func_get_arg(0); } elseif($num_args == 2){ $this->name = func_get_arg(0); $this->age = func_get_arg(1); } elseif($num_args == 3){ $this->name = func_get_arg(0); $this->age = func_get_arg(1); $this->average = func_get_arg(2); } } private function __set($propertyName,$propertyValue){ echo "</br>Ba<i>1本文来#源gaodai$ma#com搞$代*码*网</i><pre>搞代gaodaima码
sePerson __set()”; if($propertyName == “name”){ if($propertyValue == “zhangsan” || $propertyValue == “wangwu”){ $this->$propertyName = $propertyValue; } } elseif($propertyName==”age”){ if($propertyValue >150 || $propertyValue $propertyName = $propertyValue; } function __toString(){ return “name:”.($this->name).”age:”.($this->age).”average”.($this->average); }
}
回复内容：
在通过__set($propertyName,$value)设置private成员属性时，
用$this->$propertyName = $value的写法才可以进行private变量值的修改,
采用$this->propertyName = $value的写法则不能进行变量值的修改。
完整代码:
class BasePerson{
<code> private $name; private $age; private $average; function __construct(){ $num_args = func_num_args(); if($num_args == 1){ $this->name = func_get_arg(0); } elseif($num_args == 2){ $this->name = func_get_arg(0); $this->age = func_get_arg(1); } elseif($num_args == 3){ $this->name = func_get_arg(0); $this->age = func_get_arg(1); $this->average = func_get_arg(2); } } private function __set($propertyName,$propertyValue){ echo "</br>BasePerson __set()"; if($propertyName == "name"){ if($propertyValue == "zhangsan" || $propertyValue == "wangwu"){ $this->$propertyName = $propertyValue; } } elseif($propertyName=="age"){ if($propertyValue >150 || $propertyValue $propertyName = $propertyValue; } function __toString(){ return "</br>name:".($this->name)."</br>age:".($this->age)."</br>average".($this->average); }</code>
}
<code>$name = 'test';$$name = '123';var_dump($test); //输出123//希望你能理解//同理$this->$proertyName //需要看$proertyName的值, 是设置$proertyName的值这个属性$proertyName = 'age';$this->$proertyName = '12';var_dump($this->age); //输出12$this->proertyName //设置的是proertyName这个属性</code>
楼主，$this->$propertyName = $value 这样的赋值是$this实例中变量为$propertyName变量的值，此处的$propertyName仍然是个变量，而$this->propertyName就是$this的属性了；
前者的情况是这样的，例如$propertyName = 'enable';
那么$this->$propertyName 就等同与 $this->enable;
转载请注明原文链接：$this->$propertyName = $value,$this->propertyName = $value的区别？
