代码示例来自:http://www.runoob.com/php/func-mysqli-fetch-array.html
这方法早不推荐了,pdo比较靠谱~不过记录下,方便改老旧代码用。

<?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";
$result=mysqli_query($con,$sql);

// 数字数组
$row=mysqli_fetch_array($result,MYSQLI_NUM);
printf ("%s : %s",$row[0],$row[1]);

// 关联数组
$row=mysqli_fetch_array($result,MYSQLI_ASSOC);
printf ("%s : %s",$row["name"],$row["url"]);

// 释放结果集
mysqli_free_result($result);

mysqli_close($con);

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