mysqli_affected_rows(connection);

<?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();

} 

// 执行查询并输出受影响的行数

mysqli_query($con,"SELECT * FROM websites");

echo "受影响的行数: " . mysqli_affected_rows($con); 

echo "<br>"; 

mysqli_query($con,"DELETE FROM websites WHERE alexa>1000");

echo "受影响的行数: " . mysqli_affected_rows($con); 

mysqli_close($con);

?>