php - 在循环内设置键和值

我正在尝试使用来自MySQL查询的foreach在循环内添加所有数据。数据包括键和值。但是在我的代码中，它在想要的数组之前用整数键括起来。

这是代码：

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

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

我想要的是：

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)'
);

我想念什么？我究竟做错了什么？
非常感谢您的帮助。

谢谢！
-埃利

最佳答案

您需要设置键，而不是在数组内部创建新数组。

$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);