Question

这是我的数组结构：

Array
(
    [0] => Array
        (
            [0] => Array
                (
                    [topic_id] => 
                    [user_id] => ZGNjBQN9ac3K
                    [owner_id] => 15157
                    [tagged_field] => description
                    [created_date] => 2015-02-06 12:11:54
                )

            [1] => Array
                (
                    [topic_id] => 
                    [user_id] => ZGNjAmD9ac3K
                    [owner_id] => 15157
                    [tagged_field] => description
                    [created_date] => 2015-02-06 12:11:54
                )

        )

)

我在保存主题之前生成了这个结构，因此我将在此之后获得主题ID。

因此，为了保存这个数组，我需要将主题id设置为所有索引＆＃34; topic_id＆＃34; ...假设如果topic_id是11234，我需要使用值为11234的topic_id更新所有索引。< / p>

期望的输出：

Array
(
    [0] => Array
        (
            [0] => Array
                (
                    [topic_id] => 11234
                    [user_id] => ZGNjBQN9ac3K
                    [owner_id] => 15157
                    [tagged_field] => description
                    [created_date] => 2015-02-06 12:11:54
                )

            [1] => Array
                (
                    [topic_id] => 11234
                    [user_id] => ZGNjAmD9ac3K
                    [owner_id] => 15157
                    [tagged_field] => description
                    [created_date] => 2015-02-06 12:11:54
                )

        )

)

Answer 1

尝试 -

$indexedArray = array();
foreach($yourArray as $value) {
   foreach($value as $val) {
      $indexedArray[$val['topic_id']][] = $val;
   }
}

Answer 2

您可以使用 reference 变量（例如

）以简单方式完成

$yourArray = array(array(array("topic_id"=>"","user_id"=>110),array("topic_id"=>"","user_id"=>786)));

foreach($yourArray as &$value) {
   foreach($value as &$val) {
      $val['topic_id'] = "your_topic_id";
   }
}

<强>输出

Array
(
    [0] => Array
        (
            [0] => Array
                (
                    [topic_id] => your_topic_id
                    [user_id] => 110
                )

            [1] => Array
                (
                    [topic_id] => your_topic_id
                    [user_id] => 786
                )

        )

)

Answer 3

您需要在foreach循环中使用引用：

$arr = array(
    array(
      array("topic_id" => "", "user_id" => "ZGNjBQN9ac3K", "owner_id" => "15157", "tagged_field" => "description", "created_date" => "2015-02-06 12:11:54"),
      array("topic_id" => "", "user_id" => "ZGNjBQN9ac3K", "owner_id" => "15157", "tagged_field" => "description", "created_date" => "2015-02-06 12:11:54"),
    )
);

foreach($arr as &$value) {
   foreach($value as &$val) {
      $val['topic_id'] = $newvalue;
   }
}
print_r($arr);

更新具有相同索引的PHP数组的所有值

3 个答案: