在PHP中格式化数组

我正在从数据库中提取一个数组，看起来是这样的：

Array
(
    [0] => Array
        (
            [tracker_id] => 28
            [tracking_numbers] => hdkshwuy47937892hd
        )

    [1] => Array
        (
            [tracker_id] => 28
            [tracking_numbers] => 797825464411
        )

)

我需要将其重新格式化为如下所示：

Array
(
    [0] => Array
        (
            [tracker_id] => 28
            [tracking_numbers] => Array
                (
                   [0] => hdkshwuy47937892hd
                   [1] => 797825464411
                )
        )

)

我似乎无法在数组或键中找到正确的搜索，无法为单个跟踪器id创建数字数组。

试试这个

$arr_output = array();
foreach($arr_input as $arr)
{
    $tracker_id = $arr['tracker_id'];
    $tracking_numbers = $arr['tracking_numbers'];

    $arr_output[$traker_id][] = $tracking_numbers;
}

print_r($arr_output);

更新2:

$arr_output = array();
$arr_output1 = array();
foreach($arr_input as $arr)
{
    $tracker_id = $arr['tracker_id'];
    $tracking_numbers = $arr['tracking_numbers'];

    $arr_output[$traker_id][] = $tracking_numbers;
}
$i=0;
foreach($arr_output as $key=>$value)
{
    $arr_output1[$i]['tracker_id']=$key
    $arr_output1[$i]['tracking_numbers']=$value
    $i+=1;
}

print_r($arr_output1);

用于

 <?php
    $a=array
    ( array
        ('tracker_id' => 28,
                'tracking_numbers'=> "hdkshwuy47937892hd"
            ),

        array('tracker_id' => 28,
                'tracking_numbers' => "797825464411",
            ) );

     $a[0]['tracking_numbers']=array_column($a,"tracking_numbers");
    unset($a[1]);
    print_r($a);

---

差不多了。但这会将数组键设置为tracker_id，这并不完全正确。让我试试你的更新。遗憾的是，我的客户端所在的服务器不是5.5