sql查询不在本地主机上执行

Question

以下是包含在文件'Column_details.php'中的一段代码。目标是在用户单击表名时显示表的所有属性。表名在$ id中检索。问题是这个查询在phpmyadmin上成功运行。但在localhost上执行Column_details.php时不会运行。

$id = $_GET['id']; 
echo $id; 
$result = mysqli_query($conn, "show fields from '$id'"); 
$row = mysqli_num_rows($result); 
if($row<=0){ 
    echo " No such columns"; 
} 
else{ 
    echo "<table border='1'>"; 
      while($row=mysqli_fetch_array($result)){ 

       $col_name = $row['Field']; 

       $click = "<a href='Column_details.php?mv= ".$col_name."'>" . "</a>"; 
       echo "<tr>"; 
       echo "<td>" . $col_name . "</td>"; 

       echo "<td>" . $click . "</td>"; 

      } 
    echo "</table>"; 
} 
$conn->close(); 
?> 

</body> 
</html> 

Answer 1

你理清后可能需要修正你的表

echo "<table border='1'>"; 
     while($row=mysqli_fetch_array($result)){ 

      $col_name = $row['Field']; 

      $click = "<a href='Column_details.php?mv= ".$col_name."'>" .$col_name. "</a>"; 
      echo "<tr>"; 
      echo "<td>" . $col_name . "</td>"; 

      echo "<td>" . $click . "</td>"; 

     } 
echo "</table>";