PHP mysqli_field_tell() 函数

<?php 
// 假定数据库用户名：root，密码：123456，数据库：RUNOOB 
$con=mysqli_connect("localhost","root","123456","RUNOOB"); 
if (mysqli_connect_errno($con)) 
{ 
    echo "连接 MySQL 失败: " . mysqli_connect_error(); 
} 

$sql="SELECT name,url FROM websites ORDER BY alexa";

if ($result=mysqli_query($con,$sql))
{
    //获取所有字段信息
    while ($fieldinfo=mysqli_fetch_field($result))
    {
        // 获取当前字段信息
        $currentfield=mysqli_field_tell($result);
        
        printf("列 %d",$currentfield);
        echo "<br>";
        printf("字段名: %s",$fieldinfo->name);
        echo "<br>";
        printf("表名: %s",$fieldinfo->table);
        echo "<br>";
    }
    // 释放结果集
    mysqli_free_result($result);
}

mysqli_close($con);
?>