Protected Member Access

[atitthaker]

<?

class A

{

protected $b=20;

private $a=10;

protected function access()

{

print("here");

}

}

class B extends A

{

public function test()

{

$this->access() ;

}

 

}

class C extends B

{

function temp()

{

$this->access();

}

}

 

$abc= new C();

$abc->temp();

?>

 

I have above piece of code...

 

When I am executing it, it generates output "here"...

 

Now as the statement is inside a protected method of class A, which is directly not accessible by class C as it is not inheriting class A directlty(through class B though). This script is suppose to generate error, and protected method of class A shall not be accessible by class C. But it is accessing it, and printing value...

 

Why it is so??? Isn't it violation of OOP concept??

[itsmeArry]

keyword protected

• available within the class and all

children

 

have a look at this page....

 

http://www.warpstock.net/wse2006/downloads/INT09/oop.pdf

[atitthaker]

As far as I know and understand, according to OOP concept, protected member shall be accessible to it's next level child but not further.

 

So in the example below, it shall be accessible to class B but not class C.

 

In child class protected member's visibility shall reduce to private and shall not be accessible in further children...

 

Isn't it the case??

[itsmeArry]

yes thats true but you are accessing the p7ublic function temp of c with its reference and from there its accessing the protected function access.

 

but it you try to access the function access with the reference of class c it will not access that function.