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php - 如果数据库中的值等于字符串，则将数组添加到嵌套 JSON

问题描述

我的数据库中有多个表，我想将它们连接在一起以为 GET 请求创建嵌套的 JSON。有一次，我想根据数据库中的值添加一个数组，例如（type === "fixValue"）。

 ... $sql = "SELECT name, type
            FROM section INNER JOIN question ON section.section_id = question.section_id
            WHERE  question.section_id = ".$row_section['section_id']."";

            $stmtq = $db->query($sqlq);
            $stmtq -> execute();

            while( $row_question = $stmtq->fetch(PDO::FETCH_ASSOC)){

                $question_array['name'] = $row_question['name'];
                $question_array['type'] =  $row_question['type'];

                if($row_question['type'] == "fixValue"){

                    $question_array['options'] = array();

                }
                array_push($section_array['sectionQuestion'], $question_array);
            } ....

我的 json 输出现在是：

{
"name": "Test",
"something": "Test",
"array1": [
    {
        "name": "Section",
        "array2": [
            {
                "name": "Something",
                "type": "fixValue",
                "options": []
            },
            {
                "name": "Sometthing2",
                "type": "notFixValue",
                "options": []
            }
        ]
    }
]}

我想要的输出：

    {
"name": "Test",
"something": "Test",
"array1": [
    {
        "name": "Section",
        "array2": [
            {
                "name": "Something",
                "type": "fixValue",
                "options": []
            },
            {
                "name": "Sometthing2",
                "type": "notFixValue",
            }
        ]
    }
]}

因此，选项数组不仅被添加到值为“fixValue”的项目中。具有与“fixValue”不同类型值的项目应该没有“options”数组。任何想法如何实现这样的目标？

标签： phpmysqlpdo

解决方案

尝试使用计数器而不是 array_push：

... $sql = "SELECT name, type
            FROM section INNER JOIN question ON section.section_id = question.section_id
            WHERE  question.section_id = ".$row_section['section_id']."";

            $stmtq = $db->query($sqlq);
            $stmtq -> execute();
            $cnt = 0;
            while( $row_question = $stmtq->fetch(PDO::FETCH_ASSOC)){

                $question_array['name'] = $row_question['name'];
                $question_array['type'] =  $row_question['type'];

                if($row_question['type'] == "fixValue"){

                    $question_array['options'] = array();

                }
                $section_array['sectionQuestion'][$cnt] = $question_array;
                unset($question_array);
                $cnt++;
            } ....

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