json返回数组，但没有返回我想要的[关闭]

I'm a beginner in PHP and my PHPreturns json array but returns this:

[{"ContentID":"1","con_Model":"CAR_NAME","Picture_path":"localhost\/1.jpg"},{"ContentID":"2","con_Model":"CAR_NAME1","Picture_path":"localhost\/1.jpg"}]

And I want this:

["content": {"ContentID":"1","con_Model":"CAR_NAME","Picture_path":"localhost\/1.jpg"},{"ContentID":"2","con_Model":"CAR_NAME1","Picture_path":"localhost\/1.jpg"}]

My PHP code :

<?php
    $array = array();
    require("config.inc.php");
    $query="SELECT Content.ContentID,Content.con_Model,Picture.Picture_path from Content INNER JOIN Picture ON Content.ContentID = Picture.ContentID LIMIT 25;";
        try {
            $stmt = $db->prepare($query);
            $stmt->execute();
            $array = $stmt->fetchAll(PDO::FETCH_ASSOC);
        }
        catch (PDOException $ex) {
            // For testing, you could use a die and message. 
            //die("Failed to run query: " . $ex->getMessage());

            //or just use this use this one to product JSON data:
            $response["success"] = 0;
            $response["message"] = "Database Error1. Please Try Again!";
            die(json_encode($response));

        }
            json_encode($array);
            print(json_encode($array));
?>

Try this

$json_result = array("content" => $array); // puts content in string before your json
print(json_encode($json_result)); // print encoded json

The problem with your desired format is, it is not a valid JSON. A valid one has to look like this:

 {<key>:<value>, …}

You could place your key in front of the array. It would be a valid JSON.