從數組索引有時數字索引，有時不是

Question

我正在處理一個API，當有多個項目時返回一個數字索引數組，但不存在單個項目時。

以下是響應中有多個項目時返回的內容。

array(
'LineItem' => array(
    (int) 0 => array(
     'Description' => 'Advanced SEO programme', 
     'UnitAmount' => '90.00', 
     'TaxType' => 'OUTPUT2', 
     'TaxAmount' => '18.00', 
     'LineAmount' => '90.00', 
     'AccountCode' => '223', 
     'Tracking' => array(
      'TrackingCategory' => array(
       'Name' => 'Client', 
       'Option' => 'G&Ts World of Cards', 
       'TrackingCategoryID' => 'ae873c49-da89-42a5-8955-d269c5bd2dcd' 
      ) 
     ), 
     'Quantity' => '1.0000' 
    ), 
    (int) 1 => array(
     'Description' => 'Advanced Links programme', 
     'UnitAmount' => '125.00', 
     'TaxType' => 'OUTPUT2', 
     'TaxAmount' => '25.00', 
     'LineAmount' => '125.00', 
     'AccountCode' => '223', 
     'Tracking' => array(
      'TrackingCategory' => array(
       'Name' => 'Client', 
       'Option' => 'G&Ts World of Cards', 
       'TrackingCategoryID' => 'ae873c49-da89-42a5-8955-d269c5bd2dcd' 
      ) 
     ), 
     'Quantity' => '1.0000' 
    ) 
) 

）

這裏是當只有一個單一的項目返回什麼返回：

array(
'LineItem' => array(
    'Description' => 'Monthly office IT support (Email, file system and printer)', 
    'UnitAmount' => '95.00', 
    'TaxType' => 'OUTPUT2', 
    'TaxAmount' => '19.00', 
    'LineAmount' => '95.00', 
    'AccountCode' => '221', 
    'Tracking' => array(
     'TrackingCategory' => array(
      'Name' => 'Client', 
      'Option' => 'Naturewood Flooring Company Ltd', 
      'TrackingCategoryID' => 'ae873c49-da89-42a5-8955-d269c5bd2dcd' 
     ) 
    ), 
    'Quantity' => '1.0000' 
) 

）

這就是我想做的事：

foreach ($response['LineItem'] as $line) {        

         $invoices['Lineitem'][] = array(
          'description' => $line['Description'], 
          'amount' => $line['LineAmount'], 
          'account' => $line['AccountCode'], 
          'client' => $line['Tracking']['TrackingCategory']['Name'] 
         ); 
        }  

T當單個項目返回時，他不工作，我得到一個索引找不到錯誤。

我目前的解決辦法是這樣的：

if(isset($response['LineItem'][0])){ 
        foreach ($response['LineItem'] as $line) { 

         //debug($line); 

         $invoices['Lineitem'][] = array(
          'description' => $line['Description'], 
          'amount' => $line['LineAmount'], 
          'account' => $line['AccountCode'], 
          'client' => $line['Tracking']['TrackingCategory']['Name'] 
         ); 
        }   
       } else { 
        $invoices['Lineitem'][] = array(
         'description' => $response['LineItem']['Description'], 
         'amount' => $response['LineItem']['LineAmount'], 
         'account' => $response['LineItem']['AccountCode'], 
         'client' => $response['LineItem']['Tracking']['TrackingCategory']['Name'] 
        ); 
       } 

但我不認爲這是去了解它的最佳方式。有更好，更乾淨的方法嗎？

Answer 1

if(!isset($response['LineItem'][0])) 
    $response['LineItem'] = array($response['LineItem']); 

然後在兩種情況下進行一個foreach循環。

另外我建議檢查一下陣列是否爲associative