在類方法內部訪問類屬性

Question

我有一個簡單的PHP類，我試圖從該類中的方法訪問該類的屬性。我已經嘗試了$ this-> property_name語法，並且看起來不起作用。我究竟做錯了什麼？

class NavigationBuilder { 

    public $mPage; 
    public $mGeoID; 
    public $mContinent; 
    public $mCountry; 
    public $mRegion; 

    private $Geograph = 'a'; 

    public function construct_navigation() { 

    } 

    public function __construct() { 

     var_dump($Geograph); 
    } 

} 

Answer 1

你是正確的，你需要使用$this->property。 你的榜樣工作，如果你使用$this

<?php 

class NavigationBuilder { 

    public $mPage; 
    public $mGeoID; 
    public $mContinent; 
    public $mCountry; 
    public $mRegion; 

    private $Geograph = 'a'; 

    public function construct_navigation() { 

    } 

    public function __construct() { 

     var_dump($this->Geograph); 
    } 
} 

// prints string(1) "a" 
$geo = new NavigationBuilder(); 

Answer 2

試試這個：

class NavigationBuilder { 

    public $mPage; 
    public $mGeoID; 
    public $mContinent; 
    public $mCountry; 
    public $mRegion; 

    private $Geograph; 

    public function construct_navigation() { 
     $this->Geograph = 'a'; 
    } 

    public function __construct() { 

     var_dump($this->Geograph); 
    } 

}