php类在函数内调用函数

Question

谁能帮我理解如何在类方法中创建函数，这样我就可以做这样的事情:

$class->send->activation_email()

我见过很多 API 都这样做，所以我试过:

class MyClass 
{

    public function send()
    {

        function activation_email()
        {
            echo "success!";
        }

    }
}


Undefined property: MyClass::$send 

Answer 1

考虑:

class emailSender()
{
   function activation_email()
   {
      if (mail($this->to, $this->subj, $this->body)) {
          print $this->msg;
      }
}

class MyClass 
{
 var $send;
 function __construct()
 {
    $this->send=new emailSender();
    $this->send->msg="success!";
  }
}

$obj=new MyClass();
$obj->send->activation_email();