Dynamic access to a PHP array

Question

I tried to access with $this->$arrDataName[$key] on the element with the key $key from the array $this->$arrDataName. But PHP in

Answer 1

myArray = array('FooBar');
            $arrayName = 'myArray';
            echo $this->{$arrayName}[0];
        }
    }
    new Foo;

This worked perfectly for me, it printed FooBar.