Question

如何在while循环中添加多个值，我只能根据我的级别添加两个值，一个是id，另一个是title，我想添加更多字段，比如我从服务器获取请帮助任何人

  $limitStart = $_POST['limitStart'];
    $limitCount = 15;
     if(isset($limitStart) || !empty($limitstart)) {
      $con = mysqli_connect($hostname, $username, $password, $dbname);
      $query = 'SELECT id, title, caption, description, featured_image, logo, category_sku, industry_sku 
                FROM works ORDER BY title limit '.$limitStart.','.$limitCount .'';
      $result = mysqli_query($con, $query);
       $res = array();
       while ($resultSet = mysqli_fetch_assoc($result)) {
        $res[$resultSet['id']] = $resultSet['featured_image'];
      }
       echo json_encode($res);
     }

Answer 1

只需将它们全部添加，因为$resultSet已经是一个关联数组：

while ($resultSet = mysqli_fetch_assoc($result)) {
    $id = $resultSet['id'];
    unset($resultSet['id']); // <-- add this is if you don't want the id in the final set as it's now the key.
    $res[$id] = $resultSet;
}

或者选择某些字段，只需做一些基本的PHP，将additinonal字段添加为新的关联数组。

以下是添加caption和featured_image的示例：

  while ($resultSet = mysqli_fetch_assoc($result)) {
    $res[$resultSet['id']] = ['featured_image'=>$resultSet['featured_image'], 
                              'caption' => $resultSet['caption']];
  }

Answer 2

可能是这样的：

public static class WebApiConfig
{
    public static void Register(HttpConfiguration config)
    {
        var jsonFormatter = config.Formatters.JsonFormatter;
        var settings = jsonFormatter.SerializerSettings;

        settings.Converters.Add(new BsonDocumentJsonConverter());
    }
}

会做到这一点吗？

Answer 3

如果$ limitStart为14且$ limitCount为15，则应返回一个id。

$limitStart = $_POST['limitStart']; // What is this number?
$limitCount = 15;

你的if语句中有一个拼写错误，见下文。

此外，您的代码易受SQL注入攻击，因为您没有准备好您的语句。

if( isset( $limitStart ) || !empty( $limitStart ) ) { // Typo here. (small s)

    $mysqli = mysqli_connect($hostname, $username, $password, $dbname);

    $sql = "SELECT id, title, caption, description, featured_image, logo, category_sku, industry_sku 
         FROM works ORDER BY title limit ".$limitStart.",".$limitCount."";

    $stmt = $mysqli->prepare($sql); // Prepare the statement
    $stmt->bind_param("ii", $limitStart, $limitCount); // Bind the parameters
    $stmt->execute(); // Execute the query

    // Bind the result
    $stmt->bind_result($id, $title, $caption, $description, $featured_image, $logo, $category_sku, $industry_sku);
    $result  = $stmt->get_result();
    $res = array();

    while ($resultSet = $result->fetch_assoc()) {
        $res[$resultSet['id']] = $id;
    }

    $stmt->close(); // Close the statement
    $mysqli->close();

    echo json_encode($res);

}

如何在php中的while循环中从数组中调用多个值

3 个答案: