<?php

//连接数据库

mysql_connect('127.0.0.1', 'code1', '');

mysql_select_db('code1');

mysql_query("set names 'utf8'");

//已知的数据变量有

$name = '李四';

$age = 18;

$class = '高三一班';

//在这里进行数据查询

$sql = "insert into user(name,age,class)values('$name','$age','$class')";

mysql_query($sql);

$uid = mysql_insert_id();

echo $uid;