下面的是上一个的改进版，我知道为啥我的那个有问题了，因为我的__construct()这个函数的里面的那个变量名字搞错了，哎，这是经常犯得毛病，傻了吧唧，气死我了。
之前的那个变量的代码样子：
1 class db 2 { 3 public $host = "localhost";//定义默认连接方式 4 public $User= "root";//定义默认用户名 5 public $Pwd= "root";//定义默认的密码 6 public $Dbname = "thkphp5";//定义默认的数据库名 7 public $my_sql; 8 public $link; 9 public $result; 10 public function __construct($host,$user,$pwd,$dbname,$sql) { 11 $this->host=$host; 12 $this->zhang=$user; 13 $this->mi=$pwd; 14 $this->dbname=$dbname; 15 $this->my_sql=$sql; 16 $this->link= $this->connect(); 17 $this->result= $this->Query($this->my_sql); 18 } 19
看我的加粗部分，你看到了嘛，明明对应错了，所以啊，怪不得之后的代码不买账，你说你变量的名字都对应错了，人家再是小三语言，也会报错啊，所以啊，认真点
改进后的那段代码：
1 class db 2 { 3 public $host ;//= "localhost";//定义默认连接方式 4 public $User;//= "root";//定义默认用户名 5 public $Pwd;//= "root";//定义默认的密码 6 public $Dbname ;//= "thkphp5";//定义默认的数据库名 7 public $my_sql; 8 public $link; 9 public $result; 10 public function __construct($host,$user,$pwd,$dbname,$sql) { 11 $this->host=$host; 12 $this->User=$user; 13 $this->Pwd=$pwd; 14 $this->Dbname=$dbname; 15 $this->my_sql=$sql; 16 $this->link= $this->connect(); 17 $this->result= $this->Query($this->my_sql); 18 }
现在看到区别了吧，现在编译也对了，没有错误了
总的代码展示：
1 <?php 2 class db 3 { 4 public $host ;//= "localhost";//定义默认连接方式 5 public $User;//= "root";//定义默认用户名 6 public $Pwd;//= "root";//定义默认的密码 7 public $Dbname ;//= "thkphp5";//定义默认的数据库名 8 public $my_sql; 9 public $link; 10 public $result; 11 public function __construct($host,$user,$pwd,$dbname,$sql) { 12 $this->host=$host; 13 $this->User=$user; 14 $this->Pwd=$pwd; 15 $this->Dbname=$dbname; 16 $this->my_sql=$sql; 17 $this->link= $this->connect(); 18 $this->result= $this->Query($this->my_sql); 19 } 20 21 //成员方法 是用来执行sql语句的方法 22 public function Query($sql,$type=1) 23 //两个参数：sql语句，判断返回1查询或是增删改的返回 24 { 25 //造一个连接对象，参数是上面的那四个 26 // $db = new mysqli($this->host,$this->zhang,$this->mi,$this->dbname); 27 $db=$this->connect(); 28 $r = $db->query($sql); 29 if($type == "1") 30 { 31 return $r->fetch_all();//查询语句，返回数组.执行sql的返回方式是all，也可以换成row 32 } 33 else 34 { 35 return $r; 36 } 37 } 38 public function connect(){ 39 $Link= mysqli_connect($this->host,$this->User,$this->Pwd,$this->Dbname); 40 return $Link; 41 } 42 43 } 44 $sql='select * from zixun;'; 45 $shujuku=new db("localhost","root","root","thkphp5",$sql); 46 47 48 include './login.html'; 49 //var_dump($shujuku->result); 50 51 ?>
然后我的html代码展示：
1 <!-- 模板文件，利用HTML代码展示数据 --> 2 <!DOCTYPE html> 3 <html lang="en"> 4 <head> 5 <meta charset="UTF-8"> 6 <title>比赛列表</title> 7 </head> 8 <body> 9 10 <table> 11 <tr> 12 <th>ZX_id</th><th>ZX_name</th><th>ZX_fenlei</th><th>ZX_zuozhe</th><th>更新时间</th><th>浏览次数</th><th>发布状态</th> 13 </tr> 14 <?php foreach($shujuku->result as $row) : ?> 15 <tr> 16 <td><?php echo $row[0];?></td> 17 <td><?php echo $row[1];?></td> 18 <td><?php echo $row[2];?></td> 19 <td><?php echo $row[3];?></td> 20 <td><?php echo $row[4];?></td> 21 <td><?php echo $row[5];?></td> 22 <td><?php echo $row[6];?></td> 23 </tr> 24 <?php endForeach;?> 25 </table> 26 </body> 27 </html>
然后我的php文件和html文件的位置关系：
是那个b.php和login.html，不是BBB.php，那个图是上一个的，我没有重新弄，我太懒了。
然后就是结果展示：
数据库代码展示：
1 CREATE DATABASE `thkphp5` ; 2 use thkphp5 ; 3 create table zixun( 4 ZX_id int not null auto_increment primary key comment '咨询ID号', 5 ZX_name VARCHAR(80) NOT NULL COMMENT '咨询标题', 6 ZX_fenlei varchar(80) not null comment '资讯分类', 7 ZX_zuozhe varchar(80) not null comment '资讯作者', 8 gengxin_time DATETIME NOT NULL DEFAULT '2016-01-01 01:01:01' COMMENT '更新时间', 9 liulan_cishu int NOT NULL COMMENT '浏览次数', 10 fabu_zhuangtai VARCHAR(50) NOT NULL COMMENT '发布状态' 11 )engine=MyISAM charset=utf8; 12 INSERT into zixun(ZX_id, ZX_name, ZX_fenlei, ZX_zuozhe, gengxin_time, liulan_cishu, fabu_zhuangtai) values(10001, 'PHP', '理论', '王超', '2017-08-07 11:58:01', 100, '草稿'); 13 INSERT into zixun(ZX_id,ZX_name,ZX_fenlei,ZX_zuozhe,gengxin_time,liulan_cishu,fabu_zhuangtai) values(10002,'C语言','理论','王超','2017-08-07 11:58:01',100,'草稿'); 14 INSERT into zixun(ZX_id,ZX_name,ZX_fenlei,ZX_zuozhe,gengxin_time,liulan_cishu,fabu_zhuangtai) values(10003,'JAVA语言','理论','王超','2017-08-07 11:58:01',100,'草稿'); 15 INSERT into zixun(ZX_id,ZX_name,ZX_fenlei,ZX_zuozhe,gengxin_time,liulan_cishu,fabu_zhuangtai) values(10004,'Mysql语言','理论','王超','2017-08-07 11:58:01',100,'草稿'); 16 INSERT into zixun(ZX_id,ZX_name,ZX_fenlei,ZX_zuozhe,gengxin_time,liulan_cishu,fabu_zhuangtai) values(10005,'html','理论','王超','2017-08-07 11:58:01',100,'草稿'); 17 INSERT into zixun(ZX_id,ZX_name,ZX_fenlei,ZX_zuozhe,gengxin_time,liulan_cishu,fabu_zhuangtai) values(10006,'spring','理论','王超','2017-08-07 11:58:01',100,'草稿'); 18 INSERT into zixun(ZX_id,ZX_name,ZX_fenlei,ZX_zuozhe,gengxin_time,liulan_cishu,fabu_zhuangtai) values(10007,'scence','理论','王超','2017-08-07 11:58:01',100,'草稿'); 19 INSERT into zixun(ZX_id,ZX_name,ZX_fenlei,ZX_zuozhe,gengxin_time,liulan_cishu,fabu_zhuangtai) values(10008,'computer','理论','王超','2017-08-07 11:58:01',100,'草稿'); 20 INSERT into zixun(ZX_id,ZX_name,ZX_fenlei,ZX_zuozhe,gengxin_time,liulan_cishu,fabu_zhuangtai) values(10009,'math','理论','王超','2017-08-07 11:58:01',100,'草稿'); 21 INSERT into zixun(ZX_id,ZX_name,ZX_fenlei,ZX_zuozhe,gengxin_time,liulan_cishu,fabu_zhuangtai) values(100010,'english','理论','王超','2017-08-07 11:58:01',100,'草稿'); 22 INSERT into zixun(ZX_id,ZX_name,ZX_fenlei,ZX_zuozhe,gengxin_time,liulan_cishu,fabu_zhuangtai) values(10011,'word','理论','王超','2017-08-07 11:58:01',100,'草稿'); 23 INSERT into zixun(ZX_id,ZX_name,ZX_fenlei,ZX_zuozhe,gengxin_time,liulan_cishu,fabu_zhuangtai) values(10012,'jsp','理论','王超','2017-08-07 11:58:01',100,'草稿'); 24 INSERT into zixun(ZX_id,ZX_name,ZX_fenlei,ZX_zuozhe,gengxin_time,liulan_cishu,fabu_zhuangtai) values(10013,'CSS','理论','王超','2017-08-07 11:58:01',100,'草稿');