Description:
------------
Using call_user_func_array you are able to call a private or protected method of any object. I think this should not be allowed as it will lead to bad programming style as you could use this bug to access methods which should be hidden.

Reproduce code:
---------------
<?php

    class foo {
        function __construct () {
            $this->bar('1');
        }
        private function bar ( $param ) {
            echo 'Called function foo:bar('.$param.');<br>';
        }
    }

    $foo = new foo();

    call_user_func_array( array( $foo , 'bar' ) , array( '2' ) );

    $foo->bar('3');

?>

Expected result:
----------------
Called function foo:bar(1);

Fatal error: Call to private method foo::bar() from context '' in /www/htdocs/bug.php on line 14

Actual result:
--------------
Called function foo:bar(1);
Called function foo:bar(2);

Fatal error: Call to private method foo::bar() from context '' in /www/htdocs/bug.php on line 17