a::sort($array, $field, $direction = 'desc', $method = 0)

• $array (array)
  The source array
• $field (string)
  The name of the column
• $direction (string)
  desc (descending) or asc (ascending)
• $method (\const)
  A PHP sort method flag or 'natural' for natural sorting, which is not supported in PHP by sort flags
• return (array)
  The sorted array

Example

$array[0] = array(
  'id' => 1,
  'username' => 'bastian',
);

$array[1] = array(
  'id' => 2,
  'username' => 'peter',
);

$array[3] = array(
  'id' => 3,
  'username' => 'john',
);

$sorted = a::sort($array, 'username ASC');

// Array
// (
//      [0] => Array
//          (
//              [id] => 1
//              [username] => bastian
//          )
//      [1] => Array
//          (
//              [id] => 3
//              [username] => john
//          )
//      [2] => Array
//          (
//              [id] => 2
//              [username] => peter
//          )
// )