From an array loop through the items in PHP

Question

I've this array in PHP code to display some datas in a form:

Array
(
    [datas] => Array
        (
            [datas] => Array
                (
                    [1] => Array
                        (
                            [options] => Array
                                (
                                    [0] => Array
                                        (
                                            [left] => Left align
                                            [center] => Center
                                            [right] => Left align
                                        )
                                )
                        )
                )
        )
)

How can I loop and display the options details ?

This is what I have tried:

foreach ($arr['datas']['datas'] as $data) {
    foreach($data['options'] as $optionId=>$optionName) {
        echo 'key: ' . $optionId;
        echo 'value: ' . $optionName;
    }
}

But it doesn't work.

Thanks.