Question

$res=mysqli_query($con,$query);
    while($row = mysqli_fetch_row($query))
      {
        echo $row;
      }

这是我的代码，我收到如下错误：

Warning: mysql_fetch_array() expects parameter 1 to be resource, string given in C:\xampp\htdocs\smarty_framework\workloc\action_files\passAction.php on line 17

Answer 1

您似乎将实际查询传递给mysqli_fetch_row，而不是查询结果。尝试将其更改为：

$res=mysqli_query($con,$query);
while($row = mysqli_fetch_row($res))
{
    echo $row;
}

Answer 2

您正在将sql查询传递给mysqli_fetch_row();

$res=mysqli_query($con,$query);
while($row = mysqli_fetch_row($query))
{
   //your code
}

更改为：

$res=mysqli_query($con,$query);
while($row = mysqli_fetch_row($res))
{
    // your code
}

See 了解更多信息

另外，根据您的问题标题“如何显示查询结果的数量” - 您可以使用mysqli_num_rows()来获取查询返回的结果数。

像这样：

$res=mysqli_query($con,$query);

$count = mysqli_num_rows($res);

//echo $count; /* This will display the count */

if($count > 0)
{

   while($row = mysqli_fetch_row($res))
   {
       // your code
   }

}

如何显示查询结果的计数

2 个答案: