PHP mysqli_next_result() 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 FROM websites ORDER BY alexa;";
$sql .= "SELECT app_name FROM apps";

// 执行多个查询
if (mysqli_multi_query($con,$sql))
{
    do
    {
        // 存储第一个结果集
        if ($result=mysqli_store_result($con))
        {
            while ($row=mysqli_fetch_row($result))
            {
                printf("%s",$row[0]);
                echo "<br>";
            }
        }
    } while (mysqli_next_result($con));
}

mysqli_close($con);
?>