尝试使用Localhost，php和mysqli

Question

我在localhost phpmyadmin上有一个数据库，当我将图像上传到数据库时，它工作正常（它插入数据库并存储在文件夹中）;但是，当我尝试删除图像时，数据库中的记录将被删除，但图像不会从该文件夹中删除。 我把unlink放在错误的地方了吗？

存储到文件夹的代码：

$alphabet = "abcdefghijklmnopqrstuwxyzABCDEFGHIJKLMNOPQRSTUWXYZ";
$pass = array(); //remember to declare $pass as an array
$alphaLength = strlen($alphabet) - 1; //put the length -1 in cache
for ($i = 0; $i < 6; $i++) 
{
    $n = rand(0, $alphaLength);
    $pass[] = $alphabet[$n];
}
$random = implode($pass);

$imageName = $random.$_FILES['file']['name'];

move_uploaded_file($_FILES['file']['tmp_name'],'../angelimg/'.$imageName);

点击删除按钮时的代码：

if(isset($_POST['imgDelete']))
{

    $imgID = trim($_POST['imgID']);

    include("../../services/databaseConnection.php");

    if($stmt = mysqli_prepare($mysqli, "DELETE FROM ServiceImage WHERE imgID = ?"))
    {

        //bind
        mysqli_stmt_bind_param($stmt, "i", $imgID);
        //unlink image from folder
        unlink('../angelimg/'.$imageName);
        //execute
        mysqli_stmt_execute($stmt) or die (mysqli_error($mysqli));
        //close
        mysqli_stmt_close($stmt);
    }
    //close db
    mysqli_close($mysqli);
    //direct user to confirmation page of successful image upload 
    //echo("check directory");
    Header("Location: Confirmation.php");
}