20181009 用一个类封装一个连接数据库的方法
需要两个PHP文件
index.PHP
mysql.class.PHP
index.PHP代码
<?php
# 比赛列表
header('Content-Type: text/html; charset=utf-8');
include "mysql.class.php";
$config=[
"host"=>"localhost",
"name"=>"root",
"pwd"=>"",
"DbName"=>"z_075mvc"
];
$db=new mysqlDb($config);
//获得比赛列表数据
$sql = "select t1.t_name as t1_name, m.t1_score, m.t2_score, t2.t_name as t2_name, m.m_time from `match` as m left join `team` as t1 ON m.t1_id = t1.t_id left join `team` as t2 ON m.t2_id=t2.t_id";
$match_list = $db->getAssoc($sql);
?>
<!-- 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>球队一</th><th>比分</th><th>球队二</th><th>时间</th>
</tr>
<?php foreach($match_list as $row) : ?>
<tr>
<td><?php echo $row['t1_name'];?></td>
<td><?php echo $row['t1_score'];?>:<?php echo $row['t2_score'];?></td>
<td><?php echo $row['t2_name'];?></td>
<td><?php echo date('Y-m-d H:i', $row['m_time']);?></td>
</tr>
<?php endForeach;?>
</table>
</body>
</html>
mysql.class.PHP代码
<?php class mysqlDb{ public $host; //服务器地址 public $post=3306; //端口 public $name; //用户名 public $pwd; //m密码 public $DbName; //数据库名称 public $charset;//默认编码 public $link;//数据库连接对象 public $res; //资源 返回结果集 function __construct($config){ /*初始化参数*/ $this->host = $config["host"] ? $config["host"] : "localhost"; $this->name = $config["name"] ? $config["name"] : "root"; $this->pwd = $config["pwd"] ? $config["pwd"] : ""; $this->DbName = $config["DbName"] ? $config["DbName"] : "mysql"; $this->charset = $config["charset"] ?$config["charset"] : "utf8" ; /*连接数据库 设置字符集*/ $this->connectMysql(); $this->setCharSet(); } /*连接数据库*/ function connectMysql(){ $this->link = new MySQLi($this->host,$this->name,$this->pwd,$this->DbName); !mysqli_connect_error() or die("连接数据库失败"); } /*设置字符集*/ function setCharSet(){ $this->link->query("set names ".$this->charset ); } /*执行sql语句的方法*/ function DbQuery($sql){ $this->res = $this->link->query($sql); if(!$this->res){ echo ("<br />执行失败。"); echo "<br />失败的sql语句为：" . $sql; echo "<br />出错信息为：" . mysqli_error($this->link); echo "<br />错误代号为：" . mysqli_errno($this->link); die; } return $this->res; } //返回字符串 function getStr($sql){ $zhi = $this->DbQuery($sql); //将结果集转为字符串 $arr = $zhi->fetch_all(); $brr = array(); foreach($arr as $v){ $brr[] = implode(",",$v); } return implode("^",$brr); } //返回json function getJson($sql){ $zhi = $this->DbQuery($sql); $brr = array(); while($row = $zhi->fetch_assoc()){ $brr[] = $row; } return json_encode($brr); } /*返回关联数组*/ function getAssoc($sql){ $zhi = $this->DbQuery($sql); $brr = array(); while($row = $zhi->fetch_assoc()){ $brr[] = $row; } return $brr; } //返回索引数组 function getAttr($sql){ $zhi = $this->DbQuery($sql); return $zhi->fetch_all(); } }
四个返回数据的方式 想用哪个都可以调
效果图
