我有下面的数组，我想从数组中删除元素得到了相同的time，但只保留一个最低的amount，我知道排序功能，但我不知道如何使代码与删除元素，感谢欣赏这方面的指导和上帝保佑.周末快乐。

array(
    array(
        "hash" => 0x111,
        "sender" => 0x11111,
        "amount" => 0.015,
        "time" => 1683896236
    ),
    array(
        "hash" => 0x222,
        "sender" => 0x22222,
        "amount" => 0.055,
        "time" => 1683896236
    ),
    array(
        "hash" => 0x333,
        "sender" => 0x33333,
        "amount" => 0.075,
        "time" => 1683896236
    ),
    array(
        "hash" => 0x444,
        "sender" => 0x44444,
        "amount" => 0.6666,
        "time" => 1683896237
    )
)

验证码：

我尝试的是：

$this_array = explode("\n", $this_str);
$keep_array = array();

foreach($this_array as $ta) {
    $break = explode("###", $ta);

    $this_hash = $break[0];
    $this_sender = $break[1];
    $this_amount = $break[2];
    $this_time = $break[3];

    if (!array_key_exists($this_time, $keep_array)) {
        echo "This time $this_time does not exist \n";
        $keep_array[$this_time] = $this_amount;
    } else {
        if ($this_amount < $keep_array[$this_time]) {
            echo "This time $this_time exist \n";
            $keep_array[$this_time] == $this_amount;
        }
    }
}

print_r($keep_array);

我得到的回应是：

Array
(
    [1683896236] => 0.01596236
    [1683896237] => 0.6666
)

响应应为2个数组
第一个数组键= 1683896236值为0.015（所有相同时间的最小值1683896236）
第二个数组键= 1683896237值为0.6666
我不知道怎么
1.查找所有具有相同“时间”的数组
1.比较它们的“amount”值，只保留“amount”值最低的同一时间的数组元素
1.相同“时间”的较高“量”将从阵列中删除/取消设置

更新了这篇文章中给出的代码我用这样的数据集尝试了它

0x1###0x1###0.143523304620325378###1683911769
0x2###0x2###0.374362###1683911787
0x3###0x3###0.014925###1683911787
0x4###0x4###1.206308057843180009###1683911787

结果将是

Array
(
    [0] => Array
        (
            [hash] => 0x1
            [sender] => 0x1
            [amount] => 0.143523304620325378
            [time] => 1683911769
        )

    [1] => Array
        (
            [hash] => 0x3
            [sender] => 0x3
            [amount] => 0.014925
            [time] => 1683911787
        )

    [2] => Array
        (
            [hash] => 0x4
            [sender] => 0x4
            [amount] => 1.206308057843180009
            [time] => 1683911787
        )

)

1683911787的所有“时间”中预期只有1，但结果显示为2。在reduce之后，N中的1应该是数组中的唯一。