PHP method to implement array sorting based on ArraySortUtil

This article mainly introduces the usage of PHP's special array sorting class ArraySortUtil. The example analyzes ArraySortUtil's method of implementing array sorting and the corresponding usage skills. Friends in need can refer to it.

This article describes the PHP special array with examples. Sorting class ArraySortUtil usage. The details are as follows:

**
 * 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(&#39;strtolower&#39;, $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(&#39;uasortEngine&#39;, &#39;uasort_callback&#39;));
  return $sorted;
 }
}

Usage examples are as follows:

<?php
require_once(&#39;class.ArraySortUtil.php&#39;);
// 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 id="multisort-result">multisort:result</h1>";
echo "<pre class="brush:php;toolbar:false">";
 print_r($sorted);
echo "

"; $sorted = ArraySortUtil::uasort($assetData, array(   array("field"=>"category"),   array("field"=>"subcategory", "order" => true) // desc  )); echo "

uasort:result

"; echo "

";
 print_r($sorted);
echo "

";

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