在循环内设置键和值答案

【问题标题】：Set Key and Value inside Loop在循环内设置键和值
【发布时间】：2017-07-23 11:57:51
【问题描述】：

我正在尝试使用 MySQL 查询中的 foreach 将所有数据添加到循环中。数据包括键和值。但在我的代码中，它在我想要的数组之前用一个整数键括起来。

代码如下：

$count_get_airlines = $wpdb->get_var( "SELECT COUNT(*) FROM wp_shipping_airlines" );

foreach ($get_airlines as $airlines_data) {
  $data[] = [$airlines_data->letter_code => $airlines_data->shipping_airline];
}
print_r($data);

结果如下：

Array ( 
    [0] => Array ( [CA] => Air China ) 
    [1] => Array ( [PX] => Air Niugini ) 
    [2] => Array ( [OZ] => Asiana Airlines ) 
    [3] => Array ( [CI] => China Airlines ) 
    [4] => Array ( [MU] => China Eastern Airlines ) 
    [5] => Array ( [CZ] => China Southern Airlines ) 
    [6] => Array ( [ET] => Ethiopian Airlines ) 
    [7] => Array ( [EY] => Etihad ) 
    [8] => Array ( [BR] => Eva Air ) 
    [9] => Array ( [GF] => Gulf Air ) 
    [10] => Array ( [JL] => Japan Airlines ) 
    [11] => Array ( [7C] => Jeju Air ) 
    [12] => Array ( [KE] => Korean Airlines ) 
    [13] => Array ( [KU] => Kuwait Airlines ) 
    [14] => Array ( [MU] => Malaysian Airlines ) 
    [15] => Array ( [WY] => Oman Air ) 
    [16] => Array ( [QF] => Qantas Airlines ) 
    [17] => Array ( [QR] => Qatar Airways ) 
    [18] => Array ( [BI] => Royal Brunei ) 
    [19] => Array ( [SV] => Saudia Airlines ) 
    [20] => Array ( [TG] => Thai Airways ) 
    [21] => Array ( [TR] => Tiger Airways ) 
    [22] => Array ( [TK] => Turkish Airlines ) 
    [23] => Array ( [UA] => United Airlines ) 
    [24] => Array ( [MF] => Xiamen Airlines ) 
    [25] => Array ( [PR] => Philippine Airlines ) 
    [26] => Array ( [DL] => Delta Air Lines ) 
    [27] => Array ( [CX] => Cathay Pacific Airways ) 
    [28] => Array ( [SQ] => Singapore Airlines ) 
    [29] => Array ( [NH] => All Nippon Airways ) 
    [30] => Array ( [EA] => Emirates Airlines ) 
    [31] => Array ( [AK] => AirAsia Phils. ) 
    [32] => Array ( [5J] => Cebu Pacific ) 
);

我想要什么：

Array(      
    'CA'=> 'Air China (CA)',
    'PX'=> 'Air Niugini (PX)',
    'OZ'=> 'Asiana Airlines (OZ)',
    'CI'=> 'China Airlines (CI)',
    'MU'=> 'China Eastern Airlines (MU)',
    'CZ'=> 'China Southern Airlines (CZ)',
    'ET'=> 'Ethiopian Airlines (ET)',
    'EY'=> 'Etihad (EY)',
    'BR'=> 'Eva Air (BR)',
    'GF'=> 'Gulf Air (GF)',
    'JL'=> 'Japan Airlines (JL)',
    '7C'=> 'Jeju Air (7C)',
    'KE'=> 'Korean Airlines (KE)',
    'KU'=> 'Kuwait Airlines (KU)',
    'MU'=> 'Malaysian Airlines (MU)',
    'WY'=> 'Oman Air (WY)',
    'QF'=> 'Qantas Airlines (QF)',
    'QR'=> 'Qatar Airways (QR)',
    'BI'=> 'Royal Brunei (BI)',
    'SV'=> 'Saudia Airlines (SV)',
    'TG'=> 'Thai Airways (TG)',
    'TR'=> 'Tiger Airways (TR)',
    'TK'=> 'Turkish Airlines (TK)',
    'UA'=> 'United Airlines (UA)',
    'MF'=> 'Xiamen Airlines (MF)',
    'PR' => 'Philippine Airlines (PR)',
    'AK' => 'AirAsia Phils. (AK)',
    'NH' => 'All Nippon Airways (NH)',
    'CX' => 'Cathay Pacific Airways (CX)',
    '5J' => 'Cebu Pacific (5J)',
    'DL' => 'Delta Air Lines (DL)',
    'EA' => 'Emirates Airlines (EA)',
    'SQ' => 'Singapore Airlines (SQ)' 
);

我错过了什么？我究竟做错了什么？非常感谢任何帮助。

谢谢！ -伊莱

【问题讨论】：

标签： php mysql arrays loops foreach

【解决方案1】：

您需要设置密钥，而不是在数组内部创建一个新数组。

$count_get_airlines = $wpdb->get_var( "SELECT COUNT(*) FROM wp_shipping_airlines" );

$data =[];
foreach ($get_airlines as $airlines_data) {
  $data[$airlines_data->letter_code] = $airlines_data->shipping_airline;
}
print_r($data);

【讨论】：

你所有的答案都是对的！我只是想了想，也试过了。谢谢你们！再过 9 分钟，我才能接受你的回答。 :)

【解决方案2】：

请试试这个：

$count_get_airlines = $wpdb->get_var( "SELECT COUNT(*) FROM wp_shipping_airlines" );

foreach ($get_airlines as $airlines_data) {
  $data[$airlines_data->letter_code] =$airlines_data->shipping_airline;
}
print_r($data);

【讨论】：

【解决方案3】：

您正在制作一个数组，这不是您想要的。您想创建一个关联数组。试试这段代码：

$count_get_airlines = $wpdb->get_var( "SELECT COUNT(*) FROM wp_shipping_airlines" );

foreach ($get_airlines as $airlines_data) {
     $data[$airlines_data->letter_code] = sprintf('%s (%s)',
          $airlines_data->shipping_airline,
          $airlines_data->letter_code
     );
}
print_r($data);

【讨论】：

【解决方案4】：

$count_get_airlines = $wpdb->get_var( "SELECT COUNT(*) FROM wp_shipping_airlines" );

foreach ($get_airlines as $airlines_data) {
  $data[$airlines_data->letter_code] = $airlines_data->shipping_airline;
}
print_r($data);

【讨论】：

虽然欢迎使用此代码 sn-p，并且可能会提供一些帮助，但它会是 greatly improved if it included an explanation of how 和 why 这解决了问题。请记住，您正在为将来的读者回答问题，而不仅仅是现在提问的人！请edit您的答案添加解释，并说明适用的限制和假设。