使用 codeigniter 框架进行 json 编码答案

【问题标题】：json encode using codeigniter framework使用 codeigniter 框架进行 json 编码
【发布时间】：2016-08-12 22:15:57
【问题描述】：

我在这里做一个 json_encode

  public function get_posts_for_category($user_id,$category_id,$page)
{
    $cat_id = $this->ApiModel->get_category_id($category_id);
    $total_row = $this->ApiModel->get_category_posts_count($cat_id->category);
    $per_page = 2;
    $total_pages = $total_row / $per_page;
    $posts = $this->ApiModel->get_category_posts($cat_id->category,$per_page,$page);
    $data = array();
    foreach($posts as $post)
    {
        $fav = $this->ApiModel->get_favourite($user_id,$post->pid);
        if($fav == 1)
        {
            $status = 'true';
        } 
        else 
        {
            $status = 'false'; 
        }
        $array = array('pid' => $post->pid, 'uid' => $post->uid, 'title' => $post->title, 'slug' => $post->slug, 'content' => $post->content, 'image' => $post->image, 'time_stamp' => $post->time_stamp);
        $data[] = array('page' => $page, 'posts' => $array, 'is_favorite' => $status);
    }
    echo strip_tags(json_encode($data));
}

我从上面的代码得到的输出是

但我想要这样的东西

【问题讨论】：

标签： php json codeigniter

【解决方案1】：

    <?php
    public function get_posts_for_category($user_id,$category_id,$page)
    {
    $cat_id = $this->ApiModel->get_category_id($category_id);
    $total_row = $this->ApiModel->get_category_posts_count($cat_id->category);
    $per_page = 2;
    $total_pages = $total_row / $per_page;
    $posts = $this->ApiModel->get_category_posts($cat_id->category,$per_page,$page);
    $data = array();
    foreach($posts as $post)
    {
    $fav = $this->ApiModel->get_favourite($user_id,$post->pid);
    if($fav == 1)
    {
    $status = 'true';
    } 
    else 
    {
    $status = 'false'; 
    }
    $array = array('pid' => $post->pid, 'uid' => $post->uid, 'title' => $post->title, 'slug' => $post->slug, 'content' => $post->content, 'image' => $post->image, 'time_stamp' => $post->time_stamp, 'is_favorite' => $status);
    $data[] = array('page' => $page, 'posts' => $array, 'total_posts' => count($posts), 'total_pages' => $total_pages);
    }
    echo strip_tags(json_encode($data));
    }
    ?>

【讨论】：

【解决方案2】：

    $return = array(
        'page' => $page,
        'total_posts' => $total_row,
        'total_page' => $total_pages,
    );
    $data = [];
    foreach($posts as $post)
    {
        $fav = $this->ApiModel->get_favourite($user_id, $post->pid);
        if($fav == 1)
        {
            $status = 'true';
        }
        else
        {
            $status = 'false';
        }
        $array = array('pid' => $post->pid, 'uid' => $post->uid, 'title' => $post->title, 'slug' => $post->slug, 'content' => $post->content, 'image' => $post->image, 'time_stamp' => $post->time_stamp, 'is_favorite' => $status);
        $data[] = $array;
    }
    $return['posts'] = $data;
    $this->output->set_content_type('application/json');
    $this->output->set_output(json_encode($return));

只需将此代码替换为您的 foreach 和 echo 语句即可。

您永远不应该将strip_tags 与json_encode 一起使用，因为您已经在对数据进行编码，接收者可以选择做他想做的任何事情，在此过程中您可能会破坏编码。

您还应该使用CI 输出库来发送响应，您不得从控制器回显任何内容。更多详情请看这里https://ellislab.com/codeigniter/user-guide/libraries/output.html

【讨论】：

【解决方案3】：

如果您希望这样输出数值（而不是字符串），您不妨尝试一下：

json_encode($return, JSON_NUMERIC_CHECK);

要很好地格式化输出的 JSON（缩进等），请使用：

json_encode($return, JSON_PRETTY_PRINT);

您可以按照json_encode's options 使用上述各种组合。

至于布尔值（而不是作为字符串返回的“true”和“false”），您需要先将它们转换为布尔类型：

$status = (bool) true;

【讨论】：