PHP - Error traversing multidimensional associative array from Youtube API

Question

I've been trying for a while to find out why I get an error when trying to traverse this array that the Youtube API generates (tree obtained by print_r):

Array
(
    [nextPageToken] => CAIQAA
    [items] => Array
        (
            [0] => Array
                (
                    [snippet] => Array
                        (
                            [resourceId] => Array
                                (
                                    [videoId] => sGIm0-dQd8M
                                )

                        )

                )

            [1] => Array
                (
                    [snippet] => Array
                        (
                            [resourceId] => Array
                                (
                                    [videoId] => VGd1ml4Hvas
                                )

                        )

                )

        )

)

In the first instance, I tried foreach but it generates an error:

$data_decode = json_decode($data, true); //here I get my array

foreach ($data_decode as $decode){
    foreach ($decode as $code){
        echo $code['snippet']['resourceId']['videoId'];
    }
}

Invalid argument supplied for foreach()

I think the problem is for the "nextPageToken" node, which I need to have. What is the correct way to traverse this array?

a few levels too shallow. $code is an array that contains nextPageToken and items as keys. So snippet is in array[items][0]['snippet'] — ArtisticPhoenix
– ArtisticPhoenix, Commented Mar 28, 2018 at 4:47

ArtisticPhoenix · Accepted Answer · 2018-03-28 04:56:04Z

1

foreach ($data_decode['items'] as $item){
   echo $element['snippet']['resourceId']['videoId'];
}

Just a tip, it's much easier on me if you use var_export instead of print_r var_export will print an array that is syntactically correct for PHP, print_r prints an array in a human readable format.

Therefor I have to take your example data and replace all the [key] with "key" quote the values and add in commas before I can use it in code to test with.

I can do it, but it's tedious.

edited Mar 28, 2018 at 4:56

answered Mar 28, 2018 at 4:50

ArtisticPhoenix

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