$asArray = Array (
             "KEY0" => "A",
             "KEY1" => Array (
                             "key1_0" => "aa", 
                             "key1_1" => "bb",
                             "key1_2" => Array (
                                               "KeY1_0_0" => "AAA_0",
                                               "KeY1_0_1" => "BBB_0",
                                               "KeY1_0_2" => "CCC_0",
                                               "KeY1_0_3" => "DDD_0",
                                               "KeY1_0_4" => "EEE_0",
                                               "KeY1_0_5" => "FFF_0",
                                               "KeY1_0_6" => "GGG_0",
                                               ),
                             "key1_3" => Array (
                                               "KeY1_0_0" => "AAA_1",
                                               "KeY1_0_1" => "BBB_1",
                                               "KeY1_0_2" => "CCC_1",
                                               "KeY1_0_3" => "DDD_1",
                                               "KeY1_0_4" => "EEE_1",
                                               "KeY1_0_5" => "FFF_1",
                                               "KeY1_0_6" => "GGG_1",
                                               ),
                             "key1_4" => Array (
                                               "KeY1_0_0" => "AAA_2",
                                               "KeY1_0_1" => "BBB_2",
                                               "KeY1_0_2" => "CCC_2",
                                               "KeY1_0_3" => "DDD_2",
                                               "KeY1_0_4" => "EEE_2",
                                               "KeY1_0_5" => "FFF_2",
                                               "KeY1_0_6" => "GGG_2",
                                               ),
                             "key1_5" => "cc",
                             ),	
             "KEY2" => "B",
             "KEY4" => "C",
             );

function OutputArray ($saArray) {
  $asKeY = array();
  $asKeYoutput = array();
  foreach ($saArray as $sKeyArray => $sValueArray) {
    if (is_array ($sValueArray)) {
      OutputArray ($sValueArray);
    }
	else {
      //echo ($sKeyArray.' = '.$sValueArray.'<br>');
      if ($sKeyArray == 'KeY1_0_0') {
        $asKeY[] = $sValueArray;
		echo ('sKeY0 = '.$sValueArray.'<br>');
      };
      if ($sKeyArray == 'KeY1_0_1') {
        $asKeY[] = $sValueArray;
		echo ('sKeY1 = '.$sValueArray.'<br>');
      };      
	  if ($sKeyArray == 'KeY1_0_2') {
        $asKeY[] = $sValueArray;
		echo ('sKeY2 = '.$sValueArray.'<br>');
      };      
	  if ($sKeyArray == 'KeY1_0_3') {
        $asKeY[] = $sValueArray;
		echo ('sKeY3 = '.$sValueArray.'<br>');
      };      
	  if ($sKeyArray == 'KeY1_0_4') {
        $asKeY[] = $sValueArray;
		echo ('sKeY4 = '.$sValueArray.'<br>');
      };      
	  if ($sKeyArray == 'KeY1_0_5') {
        $asKeY[] = $sValueArray;
		echo ('sKeY5 = '.$sValueArray.'<br>');
      };	
	  if ($sKeyArray == 'KeY1_0_6') {
        $asKeY[] = $sValueArray;
		echo ('sKeY6 = '.$sValueArray.'<br>');
      };
	};
  };
  $asKeYoutput = $asKeY;
//  var_dump ($asKeY);
//  echo ('<br>----- '.$asKeY.' Массив: $asKeY -----<hr>');  
  echo ('<br><br>');
  var_dump ($asKeYoutput);
  echo ('<hr>');
//  echo ('<br>----- '.$asKeYoutput.' Массив: $asKeYoutput -----<hr>');  
  
  return $asKeYoutput;
}
$asOutputArray = OutputArray ($asArray);

echo '<hr>';
var_dump ($asOutputArray);
echo '<hr>';