Setter and Getter

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Class T {

public $A;
protected $B;
private $C;

public function setA(){
    $this->A = A;
}
protected function setB(){

}

public function getA(){
    $this->A = A;
}
protected function getB(){

}

}

  • 應用在讓程式可視性更高，不直接在變數定義，而是在setter去定義，再透過getter去拿取

function的部分

外部 繼承
public Yes Yes
protected No Yes
private No No