mysqli_fetch_row函数没有在网页上给出任何结果

Question

我是初学者，我正在尝试将提交的表单的值插入数据库。此外，我试图从数据库中检索一个值，并使用mysqli_fetch_row（）在我的页面上显示它。但是，页面不返回任何值。请帮忙。

 <?php
 <!--php start-->

    include('mysqlconnect.php');



            $name = $_POST['name'];
            $phone = $_POST['phone'];
            $email = $_POST['email'];
            $category = $_POST['category'];
            $cost = $_POST['cost'];
            $description = $_POST['message'];





     if((isset($_POST['submit'])))



     {

            $name_g = $GLOBALS['name'];
            $phone_g = $GLOBALS['phone'];
            $email_g = $GLOBALS['email'];
            $category_g = $GLOBALS['category'];
            $cost_g = $GLOBALS['cost'];
            $description_g = $GLOBALS['description'];

            $query = "INSERT INTO data    (name,phone,email,category,cost,description) VALUES       ('$name_g','$phone_g','$email_g','$category_g','$cost_g','$description_g')";

        (mysqli_query($conn,$query)) or die("Cannot submit, please try again");



      }
     <!--further details-->

  $key= "SELECT No from data where name =' ". $name. " '";
 $result = mysqli_query($conn,"SELECT * from data where name =' ". $name. " '");
 $row = mysqli_fetch_row($result);
 echo $row[0]; 
   ?>
   <!--end of php-->