There are 3 TYPES of visibility of method & property and are following

Public: Can be accessed from same CLASS method, child class and from outside of class.

Protected : Can be accessed from same class method, child class.

PRIVATE: Can be accessed from same class method only. 

class TestClass

{

public $public = 'Public';

protected $protected = 'Protected';

private $private = 'Private';

 function printValue()

{

echo $this->public;

echo $this->protected;

echo $this->private;

}

}

$obj = new TestClass();

echo $obj->public; // Works

echo $obj->protected; // Fatal error: Cannot access protected property TestClass::$protected in

echo $obj->private; // Fatal error: Cannot access private property TestClass::$private in C:wampwwwarunclassclass.php on line 20

$obj->printValue(); // Shows Public, Protected and Private 

There are 3 types of visibility of method & property and are following

Public: Can be accessed from same class method, child class and from outside of class.

Protected : Can be accessed from same class method, child class.

Private: Can be accessed from same class method only. 

class TestClass

{

public $public = 'Public';

protected $protected = 'Protected';

private $private = 'Private';

 function printValue()

{

echo $this->public;

echo $this->protected;

echo $this->private;

}

}

$obj = new TestClass();

echo $obj->public; // Works

echo $obj->protected; // Fatal error: Cannot access protected property TestClass::$protected in

echo $obj->private; // Fatal error: Cannot access private property TestClass::$private in C:wampwwwarunclassclass.php on line 20

$obj->printValue(); // Shows Public, Protected and Private