如何使用php一次上传多个图像

Question

我想一次在php中上传多个图像，但是图像没有移动到该文件夹​​，并且phpmyadmin中的media_image列仍然为空

<form action="" method="post" enctype="multipart/form-data">    
    <div class="form-group">
        <label for="post_status">ALBUM</label>
        <select name="media_post_id" id="">
            <?php show_albums_add_media_page(); ?>
        </select>
    </div>
    <div class="form-group">
        <label for="post_image">Post Image</label>
         <input name="file[]" type="file" multiple="multiple" />
    </div>
    <div class="form-group">
        <input class="btn btn-primary" type="submit" name="create_media" value="Publish Media">
    </div>
</form>

function add_media(){
    if(isset($_POST['create_media'])) {

        $media_post_id     = escape_string($_POST['media_post_id']);

        foreach ($_FILES['file']['tmp_name'] as $index => $tmpName) {
            if( !empty( $tmpName ) && is_uploaded_file( $tmpName ) )
            {
                $post_image        = escape_string($_FILES['file']['name']);
                $post_image_temp   = escape_string($_FILES['file']['tmp_name']);
                move_uploaded_file($post_image_temp, "../images/$post_image" );
                $query = query("INSERT INTO mediatar(media_image,media_post_id) VALUES('{$post_image}','{$media_post_id}') ");  
                confirm($query);

            }
        }

        set_message("<h4 class='bg-success'>New medias have been added!</h4>");
        redirect("index.php?media");
    }
}