上传文件后，他们被转换成一个新的数组。即时通讯制作一个显示功能，显示上传的文件+销毁他们点击

function display($type){
// echo $type;br();
// prettyR($_SESSION[$type]);
// echo"<hr>";
prettyR($_POST);
if(isset($_POST["del"])){
$p = $_POST["del"];
prettyR($_SESSION["misc"][$p]);
unlink($_SESSION["misc"][$p]["filename"]);
// $_SESSION["misc"][$p]["filename"] looks like this: upload/63eb3d2b83068_misc.jpg
unset($_SESSION["misc"][$p]);
}
echo"<form method='post'><input type='hidden' name='ka'></form>";
// this form is here so that the other forms work, because the display is in another form
if($type == "misc"){
    // echo"<hr>";
    // echo"hi";
    foreach($_SESSION[$type] as $file){
        echo"<hr>";
        // echo"hi";
        echo $file["name"];
        $key = $file["type"];
        echo"<form method='post'> <input type='hidden' value='$key' name='del'>";
        echo"<input type='submit'>";
        echo"</form>";
    }
}
}

但却显示了以下消息

• • 警告**：中未定义的数组键"63eb3d2b83c20"

我期待这个函数从文件夹中删除文件，并从misc数组中取消设置信息