如何根据需要正确格式化sql json

Question

基本上，我想从mysql获取数据并将其格式化为json：

[
  [
    "title" => "first",
    "uploader" => "root"

  ],
  [
    "title" => "first",
    "uploader" => "root"
  ],
  [
    "title" => "first",
    "uploader" => "root"
  ],
  [
    "title" => "first",
    "uploader" => "root"
  ],
  [
    "title" => "first",
    "uploader" => "root"
  ],
  [
    "title" => "first",
    "uploader" => "root"
  ],
   [
    "title" => "first",
    "uploader" => "root"
  ],
  [
    "title" => "first",
    "uploader" => "root"
  ],
  [
    "title" => "first",
    "uploader" => "root"
  ],
   [
    "title" => "first",
    "uploader" => "root"
  ],

]

我使用了以下代码：

<?php
require 'config.php';

            $query = $_GET['q'];
            if ($query==null) {
                exit('No query');
            }

$sql = "SELECT title,uploader FROM `uploads_public` WHERE Title =:query ";

        if($stmt = $pdo->prepare($sql)){
            // Bind variables to the prepared statement as parameters
            $stmt->bindParam(":query", $query, PDO::PARAM_STR);




            // Attempt to execute the prepared statement
            if($stmt->execute()){
               echo "Your search $query has the following results(normal json):<br>";
               $results = $stmt->fetchAll(PDO::FETCH_ASSOC);
               $json = json_encode($results);
               echo($json).'<br>';

               echo "While it has the following results when replaced<br>";
               echo  str_replace('}',']',str_replace(':','=>',str_replace('{', '[', "$json")));





         } else{
                echo "Something went wrong. Please try again later. <br>"; print_r($stmt->errorInfo());
            }
                    // Close statement
        unset($stmt);
        unset($pdo);
        }





   else{
    echo "No input";
} 

但不是我想要的东西（如上所述），我得到这个：

[[ “标题”=> “第一”， “上载”=> “根”]，[ “标题”=> “第一”， “上载”=> “根”]，[ “标题”=> “ first”，“ uploader” =>“ root”]，[“ title” =>“ first”，“ uploader” =>“ root”]，[“ title” =>“ first”，“ uploader” =>“根 “]，[” 标题 “=>” 第一”， “上载”=> “根”]，[ “标题”=> “第一”， “上载”=> “根”]，[ “标题”=> “ first”，“ uploader” =>“ root”]，[“ title” =>“ first”，“ uploader” =>“ root”]]

看起来还可以，但是主要的问题是我不希望将所有结果压缩在一起，我想要的就是上面提到的方法。.在每个.. [之后加上换行符（新行）， ",等等

谢谢