Question

我正在尝试使用PHP将名为“books”的表的记录保存到数组中。 book table有一些我想要获取的列。因此我写了这个查询：

"SELECT b.book_name,b.book_description,b.book_link,c.category_name FROM books b,
    category c WHERE b.category_id  = c.category_id AND b.category_id !=0"

我能够将数据提取并存储到数组中，但是当我将数组作为JSON响应打印时，您会发现问题。

{"book_name":"Book 1","0":"Book 1","book_description":"this is the book number 1","1":"this is the book number 1","book_link":null,"2":null,"category_name":"Story","3":"Story"}

我的问题，如何从数组中删除这些重复的项目（“0”：“Book 1”）？

完整的PHP代码：

<?php
include("connection.php");


        getAllBooks($cnn);

//Print result as json


function getAllBooks($cnn)
{
    $query = "SELECT b.book_name,b.book_description,b.book_link,c.category_name FROM books b,
    category c WHERE b.category_id  = c.category_id AND b.category_id !=0";
    $stmt = $cnn->prepare($query);

    $stmt->execute();
    $rowcount = $stmt->rowCount();
    $myObj = new stdClass();

if($stmt->rowCount() > 0)
{
    $books_list = array();
    while($row= $stmt->fetch())
       {
      $myObj2  = $row;
      $books_list[] = $row;
       }

       $myObj -> action_result ="success";
       $myObj -> books_list =$books_list;

   }
else
{
       $myObj -> action_result ="fail";
}

$jsonObj = json_encode($myObj);
echo $jsonObj;

}

?>

Answer 1

您要么传递PDO::ATTR_DEFAULT_FETCH_MODE，默认值为PDO::FETCH_BOTH（默认为while($row = $stmt->fetch(PDO::FETCH_ASSOC))）。

PDO :: FETCH_BOTH（默认值）：返回由结果集中返回的列名和0索引列号索引的数组。

$stmt->setFetchMode(PDO::FETCH_ASSOC);

或者在获取之前设置它：

public class Person
{

    [Required]
    public string SpecialSauce { get; set; }

    [Required]
    public string Name { get; set; }

}

数组php中的重复项

1 个答案: