Question

我想使用json在我的MySQL（PDO）中发送3个表。第一个表中有一个循环注意：第一个表（fetchAll）第二张表（获取）第三表（获取）

＆＃13;

$stmt1 = $db->prepare("SELECT * FROM data WHERE countid='1'");
$stmt1->execute();
$data = $stmt1->fetchAll(PDO::FETCH_OBJ);

$stmt2 = $db->prepare("SELECT id,title FROM weeks WHERE id='2'");
$stmt2->execute();
$data->weeks[] = $stmt2->fetch(PDO::FETCH_OBJ);

$stmt3 = $db->prepare("SELECT id,name FROM user WHERE id='1'");
$stmt3->execute();
$data->user[] = $stmt3->fetch(PDO::FETCH_OBJ);

$response = new stdClass();
$response->data[] = $data;

echo json_encode($response);

＆＃13;

如何将其发送到此格式：

＆＃13;

{"data":[
        {"title":"name of module1",
          "description":"description of module1",
          "weeks":[{"id":1,"title":"Week 01"}],
          "user":[{"id":1,"name":"george"}]
        },
        {"title":"name of module2",
          "description":"description of module2",
          "weeks":[{"id":2,"title":"Week 02"}],
          "user":[{"id":2,"name":"john"}]
        }
        ]
}

＆＃13;

数据：id，name，content，user_id，week，countid;

周： id，data_id，checkin，checkout;

用户： ID，用户名，姓名，姓氏;

（ data.id == weeks.data_id ）和（ data.user_id == user.id ）相同..

Answer 1

好的，现在需要更多的代码。您必须获取所有data行，然后使用其中的键从其他2个表中获取相关行。

$stmt = $db->prepare("SELECT * FROM data WHERE countid='1'");
$stmt->execute();
$datas = $stmt->fetchAll(PDO::FETCH_OBJ);

foreach ( $datas as $key => &$data ) {
    // get related weeks data
    $stmt = $db->prepare("SELECT id,title FROM weeks WHERE data_id=:id ORDER BY id");
    $stmt->execute( array(':id'=>$data->id) );
    $data->weeks = $stmt->fetchAll(PDO::FETCH_OBJ);

    // get related user data  
    $stmt = $db->prepare("SELECT id,name FROM user WHERE id=:id ORDER BY id");
    $stmt->execute( array(':id'=>$data->user_id) );
    $data->user = $stmt->fetchAll(PDO::FETCH_OBJ);
}

echo json_encode( array('data'=>$datas) );

结果：

{
    "data": [
        {
            "id": 1,
            "title": "name of module1",
            "description": "description of module 1",
            "user_id": 1,
            "week": "1",
            "countid": 1,
            "weeks": [
                {
                    "id": 1,
                    "title": "Week 01"
                }
            ],
            "user": [
                {
                    "id": 1,
                    "name": "chris"
                }
            ]
        },
        {
            "id": 2,
            "title": "name of module 2",
            "description": "description of module 2",
            "user_id": 2,
            "week": "2",
            "countid": 1,
            "weeks": [
                {
                    "id": 2,
                    "title": "Week 02"
                }
            ],
            "user": [
                {
                    "id": 2,
                    "name": "john"
                }
            ]
        }
    ]
}

表内的Json表

1 个答案: