ThinkPHP connection database operation case analysis-PHP Tutorial-php.cn

ThinkPHP connection database operation case analysis

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Release： 2023-03-26 11:36:01

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This time I will bring you ThinkPHPConnect to database operation case analysis, what are the precautions for ThinkPHP connectionDatabase operation, the following is a practical case, Let’s take a look.

One code

1. Complete the writing of the entry function

<?php
define(&#39;THINK_PATH&#39;, &#39;../ThinkPHP&#39;);    //定义ThinkPHP框架路径(相对于入口文件)
define(&#39;APP_NAME&#39;, &#39;App&#39;);       //定义项目名称
define(&#39;APP_PATH&#39;, &#39;./App&#39;);        //定义项目路径
require(THINK_PATH."/ThinkPHP.php");  //加载框架入口文件
App::run();               //实例化一个网站应用实例
?>

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2. Complete the writing of the controller

<?php
header("Content-Type:text/html; charset=utf-8");  //设置页面编码格式
class IndexAction extends Action{
  public function index(){
    $db_dsn="mysql://root:root@127.0.0.1:3306/db_database30";    //定义DSN
    $db = new Db();                       //执行类的实例化
    $conn=$db->getInstance($db_dsn);               //连接数据库，返回数据库驱动类
    $select=$conn->query(&#39;select * from think_user&#39;);      //执行查询语句
    $this->assign(&#39;select&#39;,$select);       // 模板变量赋值
    $this->display();              // 指定模板页
  }
  public function type(){
    $dsn = array(
      &#39;dbms&#39;   => &#39;mysql&#39;,
      &#39;username&#39; => &#39;root&#39;,
      &#39;password&#39; => &#39;root&#39;,
      &#39;hostname&#39; => &#39;localhost&#39;,
      &#39;hostport&#39; => &#39;3306&#39;,
      &#39;database&#39; => &#39;db_database30&#39;
    );
    $db = new Db();
    $conn=$db->getInstance($dsn);              //连接数据库，返回数据库驱动类
    $select=$conn->query(&#39;select * from think_type&#39;);      //执行查询语句
    $this->assign(&#39;select&#39;,$select);       // 模板变量赋值
    $this->display(&#39;type&#39;);             // 指定模板页
  }
}
?>

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3. Complete template writing

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>用户信息输出</title>
<link href="ROOT/Public/Css/style.css" rel="external nofollow" rel="external nofollow" rel="stylesheet" type="text/css" />
</head>
<body>
<table width="405" border="1" cellpadding="1" cellspacing="1" bgcolor="#99CC33" bordercolor="#FFFFFF">
 <tr>
  <td colspan="3" bgcolor="#FFFFFF" class="title" align="center">用户信息</td>
 </tr>
 <tr class="title">
  <td bgcolor="#FFFFFF" width="44">ID</td>
  <td bgcolor="#FFFFFF" width="120">名称</td>
  <td bgcolor="#FFFFFF" width="223">地址</td>
 </tr>
 <volist name=&#39;select&#39; id=&#39;user&#39; >
 <tr class="content">
  <td bgcolor="#FFFFFF"> {$user.id}</td>
  <td bgcolor="#FFFFFF"> {$user.user}</td>
  <td bgcolor="#FFFFFF"> {$user.address}</td>
 </tr>
 </volist>
</table>
</body>
</html>

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<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>类别输出</title>
<link href="ROOT/Public/Css/style.css" rel="external nofollow" rel="external nofollow" rel="stylesheet" type="text/css" />
</head>
<body>
<table width="405" border="1" cellpadding="1" cellspacing="1" bgcolor="#99CC33" bordercolor="#FFFFFF">
 <tr>
  <td colspan="3" bgcolor="#FFFFFF" class="title" align="center">类别输出</td>
 </tr>
 <tr class="title">
  <td bgcolor="#FFFFFF" width="44">ID</td>
  <td bgcolor="#FFFFFF" width="120">类别名称</td>
  <td bgcolor="#FFFFFF" width="223">添加时间</td>
 </tr>
 <volist name=&#39;select&#39; id=&#39;type&#39; >
 <tr class="content">
  <td bgcolor="#FFFFFF"> {$type.id}</td>
  <td bgcolor="#FFFFFF"> {$type.typename}</td>
  <td bgcolor="#FFFFFF"> {$type.dates}</td>
 </tr>
 </volist>
</table>
</body>
</html>

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Second running results

## I believe you have mastered the method after reading the case in this article. For more exciting information, please pay attention to other related articles on the php Chinese website!