How do I get value from multi dimensional arrays?

I can easily get twitter count as follow

echo $total_count['twitter'];

PHP:

But how can I get facebook likes and shares from this multi dimensional array?

array(4) {
["twitter"]=>int(69)
["facebook"]=> array(2) {
         ["total"]=> int(469)
         ["details"]=> array(4) {
                  ["likes"]=> int(189)
                  ["shares"]=> int(153)
                  ["comment"]=> int(127)
                  ["click"]=> int(0)
                  }
         }
["google"]=> float(6)
["pinterest"]=>int(3285)
}

Code (markup):

Edit: I figured out. It should be

echo $total_count['facebook']['details']['likes'];

PHP: