php根据某字段对多维数组进行排序的方法

function sortArrByField(&$array, $field, $desc = false){
  $fieldArr = array();
  foreach ($array as $k => $v) {
    $fieldArr[$k] = $v[$field];
  }
  $sort = $desc == false ? SORT_ASC : SORT_DESC;
  array_multisort($fieldArr, $sort, $array);
}