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：
class db
{
public $host = "localhost";//定义默认连接方式
public $User= "root";//定义默认用户名
public $Pwd= "root";//定义默认的密码
public $Dbname = "thkphp5";//定义默认的数据库名
public $my_sql;
public $link;
public $result;
public function __construct($host,$user,$pwd,$dbname,$sql) {
$this->host=$host;
$this->zhang=$user;
$this->mi=$pwd;
$this->dbname=$dbname;
$this->my_sql=$sql;
$this->link= $this->connect();
$this->result= $this->Query($this->my_sql);
}
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：
class db
{
public $host ;//= "localhost";//定义默认连接方式
public $User;//= "root";//定义默认用户名
public $Pwd;//= "root";//定义默认的密码
public $Dbname ;//= "thkphp5";//定义默认的数据库名
public $my_sql;
public $link;
public $result;
public function __construct($host,$user,$pwd,$dbname,$sql) {
$this->host=$host;
$this->User=$user;
$this->Pwd=$pwd;
$this->Dbname=$dbname;
$this->my_sql=$sql;
$this->link= $this->connect();
$this->result= $this->Query($this->my_sql);
}
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：
<?php
class db
{
public $host ;//= "localhost";//定义默认连接方式
public $User;//= "root";//定义默认用户名
public $Pwd;//= "root";//定义默认的密码
public $Dbname ;//= "thkphp5";//定义默认的数据库名
public $my_sql;
public $link;
public $result;
public function __construct($host,$user,$pwd,$dbname,$sql) {
$this->host=$host;
$this->User=$user;
$this->Pwd=$pwd;
$this->Dbname=$dbname;
$this->my_sql=$sql;
$this->link= $this->connect();
$this->result= $this->Query($this->my_sql);
} //成员方法 是用来执行sql语句的方法
public function Query($sql,$type=)
//两个参数：sql语句，判断返回1查询或是增删改的返回
{
//造一个连接对象，参数是上面的那四个
// $db = new mysqli($this->host,$this->zhang,$this->mi,$this->dbname);
$db=$this->connect();
$r = $db->query($sql);
if($type == "")
{
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
}
else
{
return $r;
}
}
public function connect(){
$Link= mysqli_connect($this->host,$this->User,$this->Pwd,$this->Dbname);
return $Link;
} }
$sql='select * from zixun;';
$shujuku=new db("localhost","root","root","thkphp5",$sql); include './login.html';
//var_dump($shujuku->result); ?>
然后我的html代码展示：
<!-- 模板文件，利用HTML代码展示数据 -->
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>比赛列表</title>
</head>
<body> <table>
<tr>
<th>ZX_id</th><th>ZX_name</th><th>ZX_fenlei</th><th>ZX_zuozhe</th><th>更新时间</th><th>浏览次数</th><th>发布状态</th>
</tr>
<?php foreach($shujuku->result as $row) : ?>
<tr>
<td><?php echo $row[];?></td>
<td><?php echo $row[];?></td>
<td><?php echo $row[];?></td>
<td><?php echo $row[];?></td>
<td><?php echo $row[];?></td>
<td><?php echo $row[];?></td>
<td><?php echo $row[];?></td>
</tr>
<?php endForeach;?>
</table>
</body>
</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：
CREATE DATABASE `thkphp5` ;
use thkphp5 ;
create table zixun(
ZX_id int not null auto_increment primary key comment '咨询ID号',
ZX_name VARCHAR() NOT NULL COMMENT '咨询标题',
ZX_fenlei varchar() not null comment '资讯分类',
ZX_zuozhe varchar() not null comment '资讯作者',
gengxin_time DATETIME NOT NULL DEFAULT '2016-01-01 01:01:01' COMMENT '更新时间',
liulan_cishu int NOT NULL COMMENT '浏览次数',
fabu_zhuangtai VARCHAR() NOT NULL COMMENT '发布状态'
)engine=MyISAM charset=utf8;
INSERT into zixun(ZX_id, ZX_name, ZX_fenlei, ZX_zuozhe, gengxin_time, liulan_cishu, fabu_zhuangtai) values(, 'PHP', '理论', '王超', '2017-08-07 11:58:01', , '草稿');
INSERT into zixun(ZX_id,ZX_name,ZX_fenlei,ZX_zuozhe,gengxin_time,liulan_cishu,fabu_zhuangtai) values(,'C语言','理论','王超','2017-08-07 11:58:01',,'草稿');
INSERT into zixun(ZX_id,ZX_name,ZX_fenlei,ZX_zuozhe,gengxin_time,liulan_cishu,fabu_zhuangtai) values(,'JAVA语言','理论','王超','2017-08-07 11:58:01',,'草稿');
INSERT into zixun(ZX_id,ZX_name,ZX_fenlei,ZX_zuozhe,gengxin_time,liulan_cishu,fabu_zhuangtai) values(,'Mysql语言','理论','王超','2017-08-07 11:58:01',,'草稿');
INSERT into zixun(ZX_id,ZX_name,ZX_fenlei,ZX_zuozhe,gengxin_time,liulan_cishu,fabu_zhuangtai) values(,'html','理论','王超','2017-08-07 11:58:01',,'草稿');
INSERT into zixun(ZX_id,ZX_name,ZX_fenlei,ZX_zuozhe,gengxin_time,liulan_cishu,fabu_zhuangtai) values(,'spring','理论','王超','2017-08-07 11:58:01',,'草稿');
INSERT into zixun(ZX_id,ZX_name,ZX_fenlei,ZX_zuozhe,gengxin_time,liulan_cishu,fabu_zhuangtai) values(,'scence','理论','王超','2017-08-07 11:58:01',,'草稿');
INSERT into zixun(ZX_id,ZX_name,ZX_fenlei,ZX_zuozhe,gengxin_time,liulan_cishu,fabu_zhuangtai) values(,'computer','理论','王超','2017-08-07 11:58:01',,'草稿');
INSERT into zixun(ZX_id,ZX_name,ZX_fenlei,ZX_zuozhe,gengxin_time,liulan_cishu,fabu_zhuangtai) values(,'math','理论','王超','2017-08-07 11:58:01',,'草稿');
INSERT into zixun(ZX_id,ZX_name,ZX_fenlei,ZX_zuozhe,gengxin_time,liulan_cishu,fabu_zhuangtai) values(,'english','理论','王超','2017-08-07 11:58:01',,'草稿');
INSERT into zixun(ZX_id,ZX_name,ZX_fenlei,ZX_zuozhe,gengxin_time,liulan_cishu,fabu_zhuangtai) values(,'word','理论','王超','2017-08-07 11:58:01',,'草稿');
INSERT into zixun(ZX_id,ZX_name,ZX_fenlei,ZX_zuozhe,gengxin_time,liulan_cishu,fabu_zhuangtai) values(,'jsp','理论','王超','2017-08-07 11:58:01',,'草稿');
INSERT into zixun(ZX_id,ZX_name,ZX_fenlei,ZX_zuozhe,gengxin_time,liulan_cishu,fabu_zhuangtai) values(,'CSS','理论','王超','2017-08-07 11:58:01',,'草稿');