php专用数组排序类ArraySortUtil用法实例

**
 * arraysortutil is a array sort utility, you can extends the sorting engine.
 *
 * @version 0.1
 * @package utility.sort
 */
class arraysortutil
{
 static function uasort($unsort, $fields)
 {
  if ( !is_array($unsort) || sizeof($unsort) <= 0 ) return $unsort;
  $sorted = uasortengine::uasort($unsort, $fields);
  return $sorted;
 }
 static function multisort($unsort, $fields)
 {
  if ( !is_array($unsort) || sizeof($unsort) <= 0 ) return $unsort;
  $sorted = multisortengine::multisort($unsort, $fields);
  return $sorted;
 }
}
class multisortengine
{
 static function multisort($unsort, $fields)
 {
  $sorted = $unsort;
  if (is_array($unsort))
  {
   $loadfields = array();
   foreach($fields as $sortfield)
   {
    $loadfields["field"][] = array(
        "name" => $sortfield["field"],
        "order" => $sortfield["order"],
        "nature" => $sortfield["nature"],
        "casesensitve" => $sortfield["casesensitve"]
    );
    $loadfields["data"][$field["field"]] = array();
   }
   // obtain a list of columns
   foreach ($sorted as $key => $row) {
    foreach($loadfields["field"] as $field) {
     $value = $row[$field["name"]];
     $loadfields["data"][$field["name"]][$key] = $value;
    }
   }
   $parameters = array();
   foreach($loadfields["field"] as $sortfield) {
    $array_data = $loadfields["data"][$sortfield["name"]];
    $casesensitve = ( $sortfield["casesensitve"] == null ) ? $sortfield["casesensitve"] : false;
    if (!$casesensitve) $array_data = array_map('strtolower', $array_data);
    $parameters[] = $array_data;
    if ( $sortfield["order"] != null ) $parameters[] = ( $sortfield["order"] ) ? sort_desc : sort_asc;
    if ( $sortfield["nature"] != null ) $parameters[] = ( $sortfield["nature"] ) ? sort_regular : sort_string;
   }
   $parameters[] = &$sorted;
   call_user_func_array("array_multisort", $parameters);
  }
  return $sorted;
 }
}
class uasortengine
{
 static private $casesensitve = false;
 static private $sortfields = array();
 static private $sortorder = true;
 static private $nature = false;
 static private function uasort_callback(&$a, &$b)
 {
  foreach(self::$sortfields as $sortfield)
  {
   $_field = $sortfield["field"];
   $_order = isset($sortfield["order"]) ? $sortfield["order"] : self::$sortorder;
   $_casesensitve = isset($sortfield["casesensitve"]) ? $sortfield["casesensitve"] : self::$casesensitve;
   $_nature = isset($sortfield["nature"]) ? $sortfield["nature"] : self::$nature;
   if ($_field != "")
   {
    $retval = 0;
    if ($_nature)
    {
     if ($_casesensitve)
     {
      $compare = strnatcmp($a[$_field], $b[$_field]);
     }
     else
     {
      $compare = strnatcasecmp($a[$_field], $b[$_field]);
     }
    }
    else
    {
     if ($_casesensitve)
     {
      $compare = strcmp($a[$_field], $b[$_field]);
     }
     else
     {
      $compare = strcasecmp($a[$_field], $b[$_field]);
     }
    }
    if ($compare !== 0 && !$_order) $compare = ($compare > 0) ? -1 : 1;
   }
   if ($compare !== 0) break;
  }
  return $compare;
 }
 static function uasort($unsort, $fields)
 {
  self::$sortfields = $fields;
  $sorted = $unsort;
  uasort($sorted, array('uasortengine', 'uasort_callback'));
  return $sorted;
 }
}

<?php
require_once('class.arraysortutil.php');
// declare test data
$assetdata[] = array("id" => 1, "category"=>"hardware", "subcategory"=>"personal computer", "supplier" => "dell", "particular"=>"vostro 1320", "purchase_price"=>2300, "other_charges"=>500);
$assetdata[] = array("id" => 2, "category"=>"hardware", "subcategory"=>"personal computer", "supplier" => "dell", "particular"=>"vostro 1420", "purchase_price"=>2500, "other_charges"=>0);
$assetdata[] = array("id" => 3, "category"=>"hardware", "subcategory"=>"laptop", "supplier" => "dell", "particular"=>"vostro 1520", "purchase_price"=>4500, "other_charges"=>100);
$assetdata[] = array("id" => 4, "category"=>"hardware", "subcategory"=>"laptop", "supplier" => "acer", "particular"=>"apire one", "purchase_price"=>2500, "other_charges"=>200);
$assetdata[] = array("id" => 5, "category"=>"furniture", "subcategory"=>"table", "supplier" => "chen", "particular"=>"manager table", "purchase_price"=>1000, "other_charges"=>0);
$assetdata[] = array("id" => 6, "category"=>"furniture", "subcategory"=>"table", "supplier" => "chen", "particular"=>"staff table", "purchase_price"=>500, "other_charges"=>0);
$assetdata[] = array("id" => 7, "category"=>"furniture", "subcategory"=>"chair", "supplier" => "chen", "particular"=>"staff chair", "purchase_price"=>500, "other_charges"=>0);
$sorted = arraysortutil::multisort($assetdata, array(
  array("field"=>"category"),
  array("field"=>"subcategory", "order" => true) // desc
 ));
echo "<h1>multisort:result</h1>";
echo "<pre>";
 print_r($sorted);
echo "</pre>";
$sorted = arraysortutil::uasort($assetdata, array(
  array("field"=>"category"),
  array("field"=>"subcategory", "order" => true) // desc
 ));
echo "<h1>uasort:result</h1>";
echo "<pre>";
 print_r($sorted);
echo "</pre>";