PHP：Foreach访问未正确索引数组的值

Question

我收到一个API调用提供的错误索引，如下所示：

(
    [0] => stdClass Object
        (
            [xml] =>  
            [qid] =>1
            [title] => Tile of the question 
            [description] => Description of the question here
        )

    [1] => xml for quetion 1 
    [2] => stdClass Object
        (
            [xml] =>  
            [qid] => 2
            [title] => Updated Question 
            [description] => description changed for edting
        )

    [3] => xml for quetion 2  
)

我可以在foreach循环中访问值，但问题是xml的每个问题在循环的下一个索引中被设置：

foreach ($array as  $key =>$node) {
     $title = $node->title;
     $des = $node->description;
     $qid = $node->qid;
     if($node->xml==''){
         // set xml value here in 1  and 3 index seen as in above output 
      }
    }

请问我该如何做？请给予建议。

- Sikander Nawaz

Answer 1

看起来你正在以“一组”数据的形式获取数据。索引0和1属于同一组，2和3也是如此，以此类推。

如果是这样，你可以将数据分成块并处理每一组：

$chunks = array_chunk($array, 2);
foreach($chunks as $chunk) {
    // $chunk[0] contains object with title, qid, ...
    // $chunk[1] contains "xml for question"
}

- Honk der Hase

---

这也是一个不错的方法，与@azibom建议的方法相比，哪个更有效率。 - Sikander Nawaz

Answer 2

只需尝试以下操作：

foreach ($array as  $key =>$node) {
    try {
        $title = $node->title;
        $des = $node->description;
        $qid = $node->qid;
        if($node->xml==''){
            $xml = $array[$key + 1];
        }
        echo "Added row with index $key";
    } catch (\Throwable $th) {
        echo "That was a xml row - The key is $key";
    }
}

- azibom

---

$xml = $array[$key + 1]; 这个可以工作，谢谢。 - Sikander Nawaz