php - PHP連想配列から値を取得する

Question

最初のインデックス「EMEA」と「IL」の名前を取得しようとしていますが、成功しません。助言がありますか？

Array ( [EMEA] => Array ( 
  [0] => Array ( 
    [disposition] => ANSWERED 
    [numOfCalls] => 8 ) 
  [1] => Array ( 
    [disposition] => BUSY 
    [numOfCalls] => 8 ) 
  [2] => Array ( 
    [disposition] => FAILED 
    [numOfCalls] => 6 ) 
  [3] => Array ( 
    [disposition] => NO ANSWER 
    [numOfCalls] => 4 ) 
  ) 
  [IL] => Array ( 
     [0] => Array ( 
       [disposition] => ANSWERED 
       [numOfCalls] => 6 ) 
     [1] => Array ( 
       [disposition] => BUSY 
       [numOfCalls] => 2 ) 
     [2] => Array ( 
       [disposition] => FAILED 
       [numOfCalls] => 3 ) 
     [3] => Array ( 
       [disposition] => NO ANSWER 
       [numOfCalls] => 2 ) 
     ) 
  )