title: How to use array_column for a 3rd level key?
body: <p>I've been working with youtube api. The playlist item's structure is the following:</p>
  <pre><code>[{
      &quot;publishedAt&quot;: datetime,
      &quot;channelId&quot;: string,
      &quot;title&quot;: string,
      &quot;description&quot;: string,
      &quot;thumbnails&quot;: {
        (key): {
          &quot;url&quot;: string,
          &quot;width&quot;: unsigned integer,
          &quot;height&quot;: unsigned integer
        }
      },
      &quot;channelTitle&quot;: string,
      &quot;playlistId&quot;: string,
      &quot;position&quot;: unsigned integer,
      &quot;resourceId&quot;: {
        &quot;kind&quot;: string,
        &quot;videoId&quot;: string,
      }
    }]
  
  </code></pre>
  <p>For every item, I want to extract the videoId (that is inside the resourceId).
  With a multidimensional array (field set), I can use array_column <code>array_column($array,'title') </code> for example. How can I retrieve the videoId property?</p>