How to get the minimum value from array row

Question

I trying to get the minimum values from the any column contains \"xx\" in the column name.

Below is my code:

Answer 1

function _getNumber($array) {
  return $array['id'];
}
$numbers = array_map('_getNumber', $array);

OR

$numbers = array_map(function($array) {
  return $array['id'];
}, $array);

echo $min = min($numbers);
echo $max = max($numbers);