如何在OOP中實現？

Question

// A is the core class 

class A{ 
    public $lang; 
    function sayhi($name){echo "Hi".$name;} 
    function speak(){echo "Can Speak".$this->lang;} 
} 

class B { 

    function TODO(){ 
     echo " Go to work "; 
    } 
} 

我現在還像這樣：

class C extends B { 

    function TODO(){ 
    //more implement here 

    $a = new A();// here I created an instance. 
     // do any actions for A 
    $a->sayhi("Newbie"); 
    } 

} 

但我想B類有A類的所有構造？

所以當我對C類DO（只是這樣的事情）

class C extends B { 

    function TODO(){ 
    //more implement here 
    // I wish I can 
     sayhi("Newbie"); 
    } 

} 

任何人能告訴我怎麼能實現呢？

Answer 1

class A{ 
    public $lang; 
    function sayhi($name){echo "Hi".$name;} //here you missed a semicolon 
    function speak(){echo "Can Speak".$this->lang;} 
} 

class B extends A { 

    function TODO(){ 
     echo " Go to work "; 
    } 
} 

class C extends B { 

    function TODO(){ 
     $this->sayhi("Newbie"); 
    } 

} 

Answer 2

不知道PHP的那麼好，但你尋找這個...

class A { 
} 

class B extends A{ 
} 

class C extends B{ 
} 

或我錯過了什麼？