TYPO3-Umlaute: Sortierung Umlaute funktioniert nicht / UTF-8

<?php
 
// data
$rows  =  array( 
    array( 
      'static_countries.cn_short_de'  =>  'Afghanistan', 
      'static_countries.uid'  =>  '3', 
      'tx_data.title'  =>  'Felix', 
			 ), 
   array( 
      'static_countries.cn_short_de'  =>  'Afghanistan', 
      'static_countries.uid'  =>  '3', 
      'tx_data.title'  =>  'Alex', 
			 ), 
    array( 
      'static_countries.cn_short_de'  =>  'Aruba', 
      'static_countries.uid'  =>  '15', 
      'tx_data.title'  =>  'Frank', 
			 ), 
    array( 
      'static_countries.cn_short_de'  =>  'Ägypten', 
      'static_countries.uid'  =>  '62', 
      'tx_data.title'  =>  'Andreas', 
			 ), 
		 );
 
//functions
define( 'FUNC_NAME', 0 );
define( 'INDEXFIELD_IN_FUNCPARAMS_POS', 1 );
define( 'FUNC_PARAMS', 2 );
 
// generates an array with keys containing all the other keys to sort for 
// in the form 'key1_key2_key3' => 0
function array_index( $array,  $field2funcArr )
{
  $indexArr = array();
  foreach( $array as $key => $valArr ) 
	{
    $currentIndex = '';
 
    foreach( $field2funcArr as $fieldid => $funcArr ) 
		{
			if( is_array($funcArr) ) 
			{
				$funcArr[FUNC_PARAMS][$funcArr[INDEXFIELD_IN_FUNCPARAMS_POS]] =  $valArr[$fieldid];
				$currentIndex.=  call_user_func_array( $funcArr[FUNC_NAME], $funcArr[FUNC_PARAMS] ).'_';
			} 
			else 
			{
				$currentIndex.= $valArr[$fieldid].'_';
			}
		}
		$indexArr[$currentIndex] = $key;
  }
  return $indexArr;
}
 
// adapted
// from http://de2.php.net/manual/en/function.usort.php , Quicker 05-Jan-2012 09:53
 
// if issortindexbykey = 1 then sorts the index array by key  
// put the rows in the correct order into $resultArr
// not sure what happens on issortindexbykey = 0
function array_sortbyindex( &$array, $indexArr, $issortindexbykey = true )
{
  // assumes complete index!: each item of indexArr must correlate a key of array
 
	// not sure about the original comment above. It works perfect with only the sorting fields
  $resultArr = array();
  if( $issortindexbykey ) 
	{
		ksort( $indexArr, SORT_LOCALE_STRING );
	}
  foreach( $indexArr as $key => $datakey )
	{	
		$resultArr[$datakey] =  $array[$datakey];
	}
 
  return $resultArr;
}
 
// from http://de2.php.net/manual/de/ref.mbstring.php
// missing mb_str_pad function
function mb_str_pad($input, $pad_length, $pad_string, $pad_style, $encoding="UTF-8&quot<img src="typo3conf/ext/mm_forum//res/smilies/icon_wink.gif" alt="icon_wink.gif" /> 
{
   return str_pad($input, strlen($input)-mb_strlen($input,$encoding)+$pad_length, $pad_string, $pad_style);
} 
 
 
////////////////////////////////////////////
////////////////////////////////////////////
// main
 
$oldLocale = setlocale( LC_COLLATE,  "0" );
echo "System Locale: $oldLocale<br><br>";
 
setlocale( LC_COLLATE,  'de_DE.utf8' );
 
$newLocale = setlocale( LC_COLLATE,  "0" );
echo "New Locale: $newLocale<br>";
 
// the values in the sub arrays are:
// array( IndexField => array(
	// FUNC_NAME, 
	// INDEXFIELD_IN_FUNCPARAMS_POS, 
	// array( '', 7, '0', STR_PAD_LEFT ) // function parameters
	// )
// );
// empty array = no transformation for this field
 
$arrayIndex = array_index( $rows,  
	array(
		'static_countries.cn_short_de' => array(
			'mb_str_pad', 
			0, 
			array( '', 15, '0', STR_PAD_RIGHT, 'UTF-8' ) 
		), 
		'tx_data.title' => array(
			'mb_str_pad', 
			0, 
			array( '', 8, '0', STR_PAD_RIGHT, 'UTF-8' ) 
		)
	)
); 
 
$sorted =	array_sortbyindex( $rows, $arrayIndex); 
echo "not sorted<br>";
var_dump($arrayIndex); 
ksort($arrayIndex, SORT_LOCALE_STRING); 
echo "sorted<br>";
var_dump($arrayIndex); 
 
var_dump($sorted); 
 
?>