他のクラスのあるクラスの変数にアクセスする方法は？

Question

私はこのような状況があります。今Person_Object's id value 10printIdInMapper()で関数をエコーする方法をここに

// Object Class 
class Person_Object { 

    protected $_id; 

    public function __construct($id = null) { 
     $this->_id = $id; 
    } 

    public function getMapper() { 
     $mapper = new Person_Mapper(); 
     return $mapper; 
    } 

    public function printIdInMapper() { 
     $this->getMapper()->printIdInMapper(); 
    } 

} 

// Mapper Class 
class Person_Mapper { 

    public function printIdInMapper() { 
     // How to access Person_Object's id here and echo id? 
    } 
} 


// Code 
$personModel = new Person_Object(10); 
$personModel->printIdInMapper(); // should print 10 

を

Answer 1

これを試してみてください：

// Object Class 
class Person_Object { 

    protected $_id; 

    public function __construct($id = null) { 
     $this->_id = $id; 
    } 

    public function getId() { 
     return $this->_id; 
    } 

    public function getMapper() { 
     $mapper = new Person_Mapper($this); 
     return $mapper; 
    } 

    public function printIdInMapper() { 
     $this->getMapper()->printIdInMapper(); 
    } 

} 

// Mapper Class 
class Person_Mapper { 
    $_person 

    public function __construct($person) { 
     $this->_person = $person 
    } 

    public function printIdInMapper() { 
     echo $this->_person->getId(); 
    } 
} 

Answer 2

A若干異なるアプローチ：

class Person_Object { 

    protected $_id; 

    public function __construct($id = null) { 
     $this->_id = $id; 
    } 

    public function getId() { 
     return $this->_id; 
    } 

    public function getMapper() { 
     $mapper = new Person_Mapper(); 

     $mapper->setPerson($this); 

     return $mapper; 
    } 

    public function printIdInMapper() { 
     $this->getMapper()->printIdInMapper(); 
    } 

} 

// Mapper Class 
class Person_Mapper { 

    protected $person; 

    public function setPerson(Person_Object $person) { 
     $this->person = $person; 
    } 

    public function getPerson() { 
     return $this->person; 
    } 

    public function printIdInMapper() { 
     echo $this->getPerson()->getId(); 
    } 
}