從PHP中的foreach數組打印值

Question

您好，以下內容是我程序中代碼的一部分。

      .......................... 
       foreach($_POST['delz'] as $delz)
       {
            $QR = "SELECT bname, bsku FROM brands WHERE id='$delz'";
            $rr= mysqli_query($db,$QR) or die ("SQL Error");
            $roV = mysqli_num_rows($rr);


       echo "<tr>
       <td class='sc_five'>
       $rr ";
              .........

當我嘗試打印$rr的值時，出現錯誤Object of class mysqli_result could not be converted to string in C:\\xam........有人可以告訴我我哪里出錯了，怎么辦？我調整自己了嗎？

編輯：

我的連接如下：

include ('../../connection/index.php'); 

Answer 1

嘗試這個：

foreach($_POST['delz'] as $delz)
    {
        $delz=mysqli_real_escape_string($db,$delz);
        $QR = "SELECT bname, bsku FROM brands WHERE id='$delz'";
        $rr= mysqli_query($db,$QR) or die ("SQL Error");
        $roV = mysqli_num_rows($rr);
        $r=$rr->fetch_assoc();
            foreach ($r as $rr)
                echo "<tr><td class='sc_five'>".$rr['bname']." ".$rr['bsku'];