20191126PHP连接数据（1）

引进数据

mysql> create database stu1 character set utf8;

mysql> use stu1

mysql> set names utf8;

mysql> source c:/stu1.sql;

连接数据库

<?php
$db=new mysqli("localhost","root","","stu1");//连mysql
$db->set_charset('utf8');

$sql="select * from grade";
$res = $db->query($sql);//执行查询

echo "一共".$res->num_rows."条数据<br />";

while($row=$res->fetch_row()){
    echo $row[3]."-".$row[0]."-".$row[1]."-".$row[2]."<br />";
}