Как "склеить" массивы в ассоциативный массив?

Подредактировал код:

function OutputArray ($saArray) {
  $asKeY = array();
  $asKeYoutput = array(); // $result_array = [];
  foreach ($saArray as $sKeyArray => $sValueArray) {
 ....
  $asKeYoutput[] = $asKeY; // $result_array [] = $array1;
 ....  
  return $asKeYoutput;
}

И не "склеивает":
Массив ($asKeYoutput): array(7) { [0]=> string(5) "AAA_0" [1]=> string(5) "BBB_0" [2]=> string(5) "CCC_0" [3]=> string(5) "DDD_0" [4]=> string(5) "EEE_0" [5]=> string(5) "FFF_0" [6]=> string(5) "GGG_0" }
Массив ($asKeYoutput): array(1) { [0]=> array(7) { [0]=> string(5) "AAA_0" [1]=> string(5) "BBB_0" [2]=> string(5) "CCC_0" [3]=> string(5) "DDD_0" [4]=> string(5) "EEE_0" [5]=> string(5) "FFF_0" [6]=> string(5) "GGG_0" } } Массив ($asKeYoutput): array(7) { [0]=> string(5) "AAA_1" [1]=> string(5) "BBB_1" [2]=> string(5) "CCC_1" [3]=> string(5) "DDD_1" [4]=> string(5) "EEE_1" [5]=> string(5) "FFF_1" [6]=> string(5) "GGG_1" }
Массив ($asKeYoutput): array(1) { [0]=> array(7) { [0]=> string(5) "AAA_1" [1]=> string(5) "BBB_1" [2]=> string(5) "CCC_1" [3]=> string(5) "DDD_1" [4]=> string(5) "EEE_1" [5]=> string(5) "FFF_1" [6]=> string(5) "GGG_1" } } Массив ($asKeYoutput): array(7) { [0]=> string(5) "AAA_2" [1]=> string(5) "BBB_2" [2]=> string(5) "CCC_2" [3]=> string(5) "DDD_2" [4]=> string(5) "EEE_2" [5]=> string(5) "FFF_2" [6]=> string(5) "GGG_2" }
Массив ($asKeYoutput): array(1) { [0]=> array(7) { [0]=> string(5) "AAA_2" [1]=> string(5) "BBB_2" [2]=> string(5) "CCC_2" [3]=> string(5) "DDD_2" [4]=> string(5) "EEE_2" [5]=> string(5) "FFF_2" [6]=> string(5) "GGG_2" } }