小编JBA*_*JBA的帖子

请帮助我，我正在尝试创建文件上传dropzone.js，但我很难找到删除上传文件的方法。这是我的代码：

索引.php

<div class="container">
<div class="file_upload">
    <form action="file_upload.php" class="dropzone">
        <div class="dz-message needsclick">
            <strong>Drop files here or click to upload.</strong><br />
        </div>
    </form>     
</div>      

文件上传.php

include_once("db_connect.php");
if(!empty($_FILES)){     
    $upload_dir = "uploads/";
    $fileName = $_FILES['file']['name'];
    $uploaded_file = $upload_dir.$fileName;    
    if(move_uploaded_file($_FILES['file']['tmp_name'],$uploaded_file)){
        //insert file information into db table
        $mysql_insert = "INSERT INTO uploads (file_name, upload_time)VALUES('".$fileName."','".date("Y-m-d H:i:s")."')";
        mysqli_query($conn, $mysql_insert) or die("database error:". mysqli_error($conn));
    }   
}

如何放置删除按钮并删除上传的文件？