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Revision: 57087
at May 14, 2012 18:57 by pruntrut
Initial Code 
function sort2d ($array, $index, $order='asc', $natsort=FALSE, $case_sensitive=FALSE) 
    {
        if(is_array($array) && count($array)>0) 
        {
           foreach(array_keys($array) as $key) 
               $temp[$key]=$array[$key][$index];
               if(!$natsort) 
                   ($order=='asc')? asort($temp) : arsort($temp);
              else 
              {
                 ($case_sensitive)? natsort($temp) : natcasesort($temp);
                 if($order!='asc') 
                     $temp=array_reverse($temp,TRUE);
           }
           foreach(array_keys($temp) as $key) 
               (is_numeric($key))? $sorted[]=$array[$key] : $sorted[$key]=$array[$key];
           return $sorted;
      }
      return $array;
    }
Initial URL 
http://www.codingforums.com/showthread.php?t=71904
Initial Description 
The following shoud do it. pass the array, index is what element you want to sort on (in your case use 3). Then you can sort asc or desc, and weather you want to use natural sorting (the way a human would sort, 2 before 10) and lastly case sensitive or not if using natural sort. Only the first 2 args are needed, the rest will default.
Initial Title 
Sorting an multidimensional array
Initial Tags 
php, array
Initial Language 
PHP