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1. Configuration file directory tp5\application\database.php
Connect through the configuration file. It can also be linked via methods.
The method in the controller is used to connect to the database; the query writing method is slightly different from the system DB class method.
// 使用方法配置数据库连接 public function data1 () { $DB = Db::connect([ // 数据库类型 'type' => 'mysql', // 服务器地址 'hostname' => '127.0.0.1', // 数据库名 'database' => 'user', // 用户名 'username' => 'root', // 密码 'password' => 'root', // 端口 'hostport' => '3306', ]); // dump($DB); // 查询数据,,,,和使用系统的DB类方法略有差异 $data = $DB -> table("uu") -> select(); dump($data); }
(recommended learning tutorial: thinkphp tutorial)
2. Basic usage, addition, deletion, modification and query
The controller uses the configuration file to connect to the database
The file under the controller (tp5\application\index\controller\Index.php )Write
<?php namespace app\index\controller; use think\Db; use think\Controller; class Index extends Controller { public function index() { // return '上课来'; return $this -> fetch(); } // 使用配置文件连接数据库 public function data() { // 实例化数据库系统类 $DB = new Db; // 查询数据,表名为uu的所有数据 $data = $DB::table("uu") -> select(); // 使用sql语句 //$data = $DB::query("select * from uu"); dump($data); } }
3. Render the data to the template page
<?php namespace app\index\controller; use think\Db; use think\Controller; // 使用model连接数据库要引入moadel use think\Model; class Index extends Controller { public function index() { // return 's'; $this -> data(); return $this -> fetch(); } // 使用系统配置文件连接数据库 public function data() { // 实例化数据库系统类 $DB = new Db; // 查询数据 $data = $DB::table("uu") -> select(); $this -> assign("user",$data); // dump($data); } }
4. The template page can reference the rendering data
tp5\application\index\view\index\index .html
<!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <title>s</title> </head> <body> <div> s</div> {volist name="user" id="vo"} <a href="">{$vo.name}</a> {/volist} </body> </html>
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