PHP類與具有對象是可訪問這些對象

Question

我有一個主PHP類如此屬性：

class MyClass { 
    public $a; 
    public $b; 

    function __construct() 
    { 
     $this->a = new \SomeClass(); 
     $this->b = 'some string'; 
    } 
} 

是有辦法，其被存儲在$a（SomeClass）屬性的類可以訪問$b值，它實際上是存儲在啓動$a（MyClass）的類中的屬性？

Answer 1

你可以做這樣的事情：

class MyClass { 
    public $a; 
    public $b; 

    function __construct() 
    { 
     $this->a = new \SomeClass($this); 
     $this->b = 'some string'; 
    } 
} 

class SomeClass { 
    public $mc; 

    function __construct(MyClass $mc) 
    { 
     $this->mc = $mc; 
    } 
} 

$myClass = new MyClass(); 
echo $myClass->a->mc->b; 

輸出將是：some string

Answer 2

你可以做這樣的事情：

class MyClass { 
    public $a; 
    public $b; 

    function __construct() 
    { 
     $this->b = 'some string'; 
     $this->a = new \SomeClass($this->b); 
    } 
} 

class SomeClass{ 

    function __construct($b) 
    { 
     echo $b; // it will become a $this->b as given while creating new class in MyClass 
    } 
}