php mysqli 增删改

<?php 

$connect=mysqli_connect('127.0.0.1','root','root','dbname');

if(!$connect){
    exit('链接错误'.mysqli_connect_error());
}

mysqli_query($connect,"update user set name='来点中文a' where id=10;");

echo mysqli_affected_rows($connect);

mysqli_close($connect);

 ?>