Question

There is a php class in which I like to change the variable, but I can t make it happen. The Class:

class ShopCart 
{
    private $maincurrency =  USD ;

    private function set_Currency() {
        $maincurrency =  GBP ;
        return $maincurrency;
    }
}

这并不奏效。即使我公开发表。我做了什么错误?

Answer 1

您必须使用<代码>$this->maincurrency。你目前的法典产生和确定地方变量,而不是成员。

Answer 2

您:$:

class ShopCart {
   private $maincurrency =  USD ;

   private function set_Currency() {
       $this->$maincurrency =  GBP ;
       return $this->$maincurrency;
   }
}

否则,你会重新创造新的地方功能,然后才使用这一功能。

该手册实际上告诉你:

Within class methods the properties, constants, and methods may be accessed by using the form $this->property (where property is the name of the property) unless the access is to a static property within the context of a static class method, in which case it is accessed using the form self::$property.

The documentation is your friend; consult it before asking here please.

^{You may also Hope to consider notreturning any from a setter,beit that s up to You. 这样做是有好处的,即使它并非都包含在PHP中。}

Answer 3

class ShopCart {
    private $maincurrency =  USD ;

    private function setCurrency() {
        $this->maincurrency =  GBP ;
    }

}

Answer 4

change $maincurrency = GBP ; to $this->maincurrency = GBP ;, and also return $this->maincurrency;

友情链接