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Sort by specific array key

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  1. function array_sort($array, $on, $order=SORT_ASC)
  2. {
  3.     $new_array = array();
  4.     $sortable_array = array();
  5.  
  6.     if (count($array) > 0) {
  7.         foreach ($array as $k => $v) {
  8.             if (is_array($v)) {
  9.                 foreach ($v as $k2 => $v2) {
  10.                     if ($k2 == $on) {
  11.                         $sortable_array[$k] = $v2;
  12.                     }
  13.                 }
  14.             } else {
  15.                 $sortable_array[$k] = $v;
  16.             }
  17.         }
  18.  
  19.         switch ($order) {
  20.             case SORT_ASC:
  21.                 asort($sortable_array);
  22.             break;
  23.             case SORT_DESC:
  24.                 arsort($sortable_array);
  25.             break;
  26.         }
  27.  
  28.         foreach ($sortable_array as $k => $v) {
  29.             $new_array[$k] = $array[$k];
  30.         }
  31.     }
  32.  
  33.     return $new_array;
  34. }

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