How to get key value in multidimensional array?

Question

PHP

Constantly different arrays of the form come:

Array
(
    [37:10] => Array
        (
            [VALUE] => 55.75303026534,37.463532104492
        )

)

Array
(
    [37:05] => Array
        (
            array 
            (
                    [VALUE] => 55.75303026534,37.463532104492
            )
        )

)

In them, I'm only interested in the VALUE key and its value.
How easy is it to get the value? An array can be nested differently, but the VALUE key is always the same in different places...

Answer 1

php.net/manual/en/function.array-walk-recursive.php

array_walk_recursive (&$data, function($val, $key) {
  if ($key === "VALUE") echo $val;
})

Answer 2

Convert to json string and "pull out" regular expression?