获取多维数组中最后出现的具有限定列值的子集的第一级键

我需要找到与以下数组中最后一次出现 (id = 100001203541047) 相对应的键：

[0] => Array
        (
            [id] => 10152583762905798_10152583800415798
            [from] => Array
                (
                    [id] => 100001203541047
                    [name] => Gangareddy Chealimealla
                )

            [message] => Desi Flipkart
            [created_time] => 2014-07-30T07:30:34+0000
            [like_count] => 0
            [user_likes] =>
            [can_comment] => 1
        )

    [1] => Array
        (
            [id] => 10152583762905798_10152583786375798
            [from] => Array
                (
                    [id] => 100001430479186
                    [name] => Pratik Das
                )

            [message] => flipkart rules! (y)
            [created_time] => 2014-07-30T07:16:56+0000
            [like_count] => 0
            [user_likes] =>
            [can_comment] => 1
        )

    [2] => Array
        (

            [id] => 10152583762905798_10152583802415798
            [from] => Array
                (
                    [id] => 100001203541047
                    [name] => Gangareddy Chealimealla
                )

            [message] => Desi Flipkart
            [created_time] => 2014-07-30T08:30:34+0000
            [like_count] => 0
            [user_likes] =>
            [can_comment] => 1
        )

我尝试了以下代码，但它返回了 2 个位置。

 foreach($arr as $key => $array)
 {
     if ( $array['from']['id'] === $id)
         echo $key."\n\n";
     }
 }

为什么这不只显示最后一个？

您已经编写的代码几乎可以工作。问题是，每次在 foreach 循环中遇到与 id 匹配的键时，它都会立即打印该键。

foreach($arr as $key => $array) {
    if ( $array['from']['id'] === $id) {
        echo $key."\n\n";
    }
}

相反，如果您将键存储在变量中，则循环完成后，变量中的值将是最后一个，您可以打印它。

$last = "";
foreach($arr as $key => $array) {
    if ( $array['from']['id'] === $id) {
        $last = $key;
    }
}
echo $last."\n\n";