重载get

魔术方法get__

• 将不符号条件属性过滤掉

  <?php
  // 重载
  class Demo
  {
    //定义私有 属性
    private $techer = "杨";
    private $role = "1";
    // 属性重载，__get魔术方法,不经过属性直接访问到魔术方法
    public function __get($name)
    {
        if ($this->role === "英雄")
            return $this->techer;
        else
            return "非法访问...";
    }
  }
  $obj = new Demo;
  echo $obj->$techer;