sortByColumns

<?php

$data = array(
  array('volume' => 67, 'edition' => 2),
  array('volume' => 86, 'edition' => 1),
  array('volume' => 85, 'edition' => 6),
  array('volume' => 98, 'edition' => 2),
  array('volume' => 86, 'edition' => 6),
  array('volume' => 67, 'edition' => 7)
);

var_dump($data);
$sorted = $data;

usort(
  $sorted, 
  function($i1, $i2) {
    $result = strnatcasecmp($i1['volume'], $i2['volume']);
    if (0 == $result) {
      $result = strnatcasecmp($i1['edition'], $i2['edition']);
    }
    return $result;
  }
);

var_dump($sorted);

class CompareColumns {
  
  private $_columns = array();
  private $_callback = 'strnatcasecmp';

  public function __construct(array $columns, Callable $callback = NULL) {
    $this->_columns = $columns;
    if (isset($callback)) {
      $this->_callback = $callback;
    }
  }
  
  public function __invoke() {
    list($one, $two) = func_get_args();
    $result = 0;
    foreach ($this->_columns as $column) {
      $result = call_user_func($this->_callback, $one[$column], $two[$column]);
      if ($result !== 0) {
        break;
      }
    }
    return $result;
  }
}

usort(
  $sorted, 
  new CompareColumns(array('volume', 'edition'))
);

var_dump($sorted);