PHP Magic Method __unset() does not work on calling unset function -

i not understand why __unset() not work.

class myclass {     public $name = array();      public function __set($arraykey, $value){         $this->name[$arraykey] = $value;     }      public function __isset($argu){         return isset($this->name[$argu]);     }      public function __unset($argu){          echo "working: unset $this->name[$argu]";         unset($this->name[$argu]);     } }  $obj = new myclass; $obj->name = 'arfan haider';  var_dump(isset($obj->name));  unset($obj->name); 

i read whenever unset() function called, magic method __unset() automatically called , unsets variable.

in above code using unset not call __unset(). why? missing in understanding magic method __unset()?

the magic methods __set, __get, __isset , __unset called when accessing inaccessible properties. means either private properties, protected properties (accessed outside of child class) or properties haven't been created.

calling internal variable $_name instead of $name, or setting $name private or protected instead of public fix problem.

note:

you should use protected properties or functions when need accessible extending class - don't use because.