Question

如果对此有答案，请提前抱歉，但我找不到我要找的确切内容。

我目前有一个报告应用程序，它将数据结果从数据库查询返回到多维数组。每个数组都是基于id字段构建的。我希望能够将数组合并到id相同的数组中。

例如，这是一个测试结果集。如您所见，id为1的用户当前有两个结果。

Array
(

    [0] => Array
    (
        [AssessmentQuestion] => 1
        [AssessmentAnswer] => 0
        [id] => 1
    )

    [1] => Array
    (
        [AssessmentQuestion] => 2
        [AssessmentAnswer] => 2
        [id] => 1
    )
)

Array
(   
    [0] => Array    
    (
        [AssessmentQuestion] => 1
        [AssessmentAnswer] => 1
        [id] => 2
    )
)

如果id是相同的，我希望结果集看起来像这样。

Array
(
    [0] => Array
    (
        [AssessmentQuestion] => 1
        [AssessmentAnswer] => 0
        [AssessmentQuestion] => 2
        [AssessmentAnswer] => 2
        [id] => 1
    )
)

非常感谢。

以下是我正在运行的查询。有一个自定义函数ArrayFunctions :: captureArrayFromResult（），这只是捕获数组结果。第一个查询只是获取所有活动用户条目ID，然后每个id返回所有评估问题信息。

/**** COLLECT ALL ACTIVE USER ENTRY IDS ****/
$query = "SELECT DISTINCT ue.id
          FROM user_entry ue
          LEFT JOIN user_demographic_answers uda ON ue.id = uda.user_entry_id
          LEFT JOIN user_assessment_answers uaa ON ue.id = uaa.user_entry_id 
          WHERE $condition
          AND DATE(ue.datetime_finished) BETWEEN '{$this->reportDateRangeStart}' AND    '{$this->reportDateRangeEnd}'";
$results = db_Query($query);
$this->reportUserEntryID = ArrayFunctions::captureArrayFromResult($results, "id", "id");

foreach($this->reportUserEntryID as $userID)
{
    /**** COLLECT ASSESSMENT QUESTIONS ****/
    $query = SELECT DISTINCT uaa.question_id as 'AssessmentQuestion', uaa.answer_value as 'AssessmentAnswer', ue.id
          FROM user_assessment_answers uaa
          LEFT JOIN report_field_options rfo ON uaa.question_id = rfo.assessment_question_id
          LEFT JOIN user_entry ue ON uaa.user_entry_id = ue.id
          WHERE ($condition)
          AND DATE(ue.datetime_finished) BETWEEN '{$this->reportDateRangeStart}' AND '{$this->reportDateRangeEnd}'
          AND ue.id IN ($userID)
          ORDER BY uaa.question_id";
    $results = db_Query($query);
    $this->reportQuestionAssessmentAnswers = ArrayFunctions::captureArrayFromResult($results);
}

Answer 1

简短回答：由于数组键必须是唯一的，因此无法按照您的要求进行操作。

我建议，在合并逻辑期间，创建一个AssesmentQuestions和AssesmentAnswers的数组，例如：

Array
(
    [0] => Array
    (
        [id] => 1,
        [AssesmentQuestions] => Array
        (
            [0] => 1,
            [1] => 2
        ),
        [AssesmentAnswers] => Array
        (
            [0] => 0,
            [1] => 2
        )
    )
)

Answer 2

您可以使用foreach循环来实现此目的：

$main_arr = array
(
     array
     (
         'AssessmentQuestion' => 1,
         'AssessmentAnswer' => 0,
         'id' => 1
     ),
     array
     (
         'AssessmentQuestion' => 2,
         'AssessmentAnswer' => 2,
         'id'=> 1
     ),
     array
     (
         'AssessmentQuestion' => 3,
         'AssessmentAnswer' => 4,
         'id' => 2
     ),
     array
     (
        'AssessmentQuestion' => 5,
        'AssessmentAnswer' => 6,
        'id'=> 1
     )
);

foreach ($main_arr as $arr) {
     $new_arr[$arr['id']]['id']  = $arr['id'];
     $new_arr[$arr['id']]['AssessmentQuestions'][] = $arr['AssessmentQuestion'];
     $new_arr[$arr['id']]['AssessmentAnswers'][] = $arr['AssessmentAnswer'];
}
var_dump($new_arr);

合并动态多维数组

2 个答案: