mysqli扩展库操作mysql数据库

Posted 2020-08-11

• 配置环境

配置php.ini文件让php支持mysqli扩展库

extension=php_mysqli.dll

• 建库建表

详见博客 “mysql扩展库操作mysql数据库”

• 查询数据库

 1 <?php
 2     //mysqli扩展库操作mysql数据库，面向对象
 3     $mysqli=new MySQLi("localhost","root","root","test");
 4     if($mysqli->connect_error){
 5         die("连接数据库失败".$mysqli->connect_error);
 6     }
 7     $sql="select * from user1";
 8     $res=$mysqli->query($sql);
 9     while($row=$res->fetch_row()){
10         foreach($row as $key=>$val){
11             echo "--".$val;
12         }
13         echo "<br/>";
14     }
15     $res->free();
16     $mysqli->close();
17 ?>

结果如下：

• 增删改数据库

 

 1 <?php
 2     //mysqli扩展库操作mysql数据库，面向对象
 3     $mysqli=new MySQLi("localhost","root","root","test");
 4     if($mysqli->connect_error){
 5         die("连接数据库失败".$mysqli->connect_error);
 6     }
 7     //$sql="insert into user1 (name,password,age,birthday) values (‘wpp‘,md5(‘wpp‘),25,‘1991-05-05‘)";
 8     //$sql="update user1 set age=24 where name=‘wpp‘";
 9     $sql="delete from user1 where name=‘wpp‘";
10     $res=$mysqli->query($sql);
11     if(!$res){
12         echo "操作失败".$mysqli->error;
13     }else{
14         if($mysqli->affected_rows>0){
15             echo "操作成功";
16         }else{
17             echo "没有行受到影响";
18         }
19     }
20     $mysqli->close();
21 ?>