Php 从前端将多个图像上载到帖子

我已经参考了这个链接来为一篇文章添加多个图像。 代码正在运行，即图像正在上载到媒体库，但未显示在帖子中。请告诉我是否必须在帖子中创建一个字段来存储它们。如果是，怎么做

提交帖子的代码：

 <div class="new-post">
<form action="" method="post" enctype="multipart/form-data">
    <div class="form-group">
        <label for="title">Title :</label><br />
        <input class="form-control" type="text" id="title" value="" tabindex="1" size="20" name="title" minlength="5" required />
    </div>
    <div class="form-group">
        <label for="description">Description :</label><br />
        <textarea class="form-control" id="description" tabindex="3" name="description" cols="50" rows="6" minlength="30" required></textarea>
    </div>
    <div class="form-group">
        <?php 
        $args_drop = array(
            'show_option_none'   => 'Category',
            'hide_empty'         => false,
            'include'            => '26, 27, 29, 34, 33',
            'tab_index'          => 3,
            'taxonomy'           => 'category',
        );
        wp_dropdown_categories($args_drop);
        ?>
    </div>


    <div class="form-group">
        <label for="file">Image 2 :</label>
        <input type="file" name="custom_1" value="Custom Field 1 Content" />
    </div>

    <div class="form-group">
        <label for="postPhoto1">Photo 1 :</label>
        <input type="file" name="upload_attachment[]" id="postPhoto1">
    </div>

    <div class="form-group">
        <label for="postPhoto1">Photo 2 :</label>
        <input type="file" name="upload_attachment[]" id="postPhoto2">
    </div>   


    <input type="submit" value="Submit" tabindex="6" id="submit" name="submit" />

    <input type="hidden" name="post_type" id="post_type" value="domande" />
    <input type="hidden" name="action" value="post" />
    <?php wp_nonce_field( 'new-post' ); ?>
</form>

}

现在的问题是，通过这段代码，我可以上传这些图片，但我应该把它们保存在哪里呢。就像一个特色图片在文章中有一个部分，在那里保存或者我如何将它们检索到一个页面

---

谢谢

请提供更多信息：您做了什么，代码示例，预期和实际结果等。欢迎访问SO。请注意，“编写/调试我的代码”、“为我推荐/搜索”、“教程”请求和“低工作量”、“不清楚”、“基于意见”的问题。好的问题，如中所述，应进行研究，对问题进行清楚的解释，并应包括对未来访客有用的答案。请查看其是否清晰：-）

// Check if the form was submitted
if( 'POST' == $_SERVER['REQUEST_METHOD'] && !empty( $_POST['action'] )) {

// Do some minor form validation to make sure there is content
if (isset ($_POST['title'])) { 
    $title =  $_POST['title'];

} else { 
    echo 'Please enter a title';
}
if (isset ($_POST['description'])) { 
    $description = $_POST['description']; 
} else { 
    echo 'Please enter the content'; 
}

$custom_field_1 = $_POST['custom_1'];

// Add the content of the form to $post as an array
$post = array(
    'post_title'    => $title,
    'post_content'  => $description,
    'post_category' => array($_POST['cat']),

    'post_status'   => 'publish',         // Choose: publish, preview, future, etc.
    'post_type'     => 'work'  // Use a custom post type if you want to
);
$pid = wp_insert_post($post);  // Pass  the value of $post to WordPress the insert function    

if ( $_FILES ) {
    $files = $_FILES['upload_attachment'];
    foreach ($files['name'] as $key => $value) {
        if ($files['name'][$key]) {
            $file = array(
                'name'     => $files['name'][$key],
                'type'     => $files['type'][$key],
                'tmp_name' => $files['tmp_name'][$key],
                'error'    => $files['error'][$key],
                'size'     => $files['size'][$key]
            );

            $_FILES = array("upload_attachment" => $file);

            foreach ($_FILES as $file => $array) {
                $newupload = insert_attachment($file,$pid);
            }
        }
    }
}
$category_filter = array($_POST['cat_filter']);