PHP MySQL JSON按數據組織

Question

我需要能夠通過類別名稱來組織我的JSON。 我將兩個表按類別ID（項目）和鍵（類別）鏈接在一起。 我希望能夠組織所有用類別ID標記的項目，以便在類別表的類別名稱下進行組織。 到目前為止，這是我的代碼：

$query = "SELECT * FROM items,category WHERE items.category_id = category.key";
$result = mysql_query($query,$link) or die('Errant query:  '.$query);
 while($row = mysql_fetch_array($result))

extract($row);
    $channel['items'][] = array(
          'title' => $title,
    'category_id' => $category_id,
    'category_name' => $category_name,
    'category_key' => $key,
    );
}   
    $channels = array($channel);
    $json = json_encode($channel);
    header('Content-type: application/json');
    echo $json;
}

這樣輸出JSON：

{
"items": [
    {
        "title": "putting in title",
        "category_id": "7",
        "category_name": "Stuff 1",
        "category_key": "7"
    },
    {
        "title": "another title",
        "category_id": "7",
        "category_name": "Stuff 1",
        "category_key": "7"
    },

但是我需要按類別名稱來組織JSON，如下所示：

{
"Stuff 1": [
    {
        "title": "putting in title",
        "category_id": "7",
        "category_name": "Stuff 1",
        "category_key": "7"
    },
    {
        "title": "another title",
        "category_id": "7",
        "category_name": "Stuff 1",
        "category_key": "7"
    },
"Stuff 2": [
    {
        "title": "putting in title",
        "category_id": "7",
        "category_name": "Stuff 2",
        "category_key": "7"
    },
    {
        "title": "another title",
        "category_id": "7",
        "category_name": "Stuff 2",
        "category_key": "7"
    },

任何幫助實現這一目標將不勝感激！

Answer 1

嘗試這個：

$channel[$category_name][] = array(
      'title' => $title,
'category_id' => $category_id,
'category_name' => $category_name,
'category_key' => $key,
);