一个ci框架的小demo
最近在学习ci框架，作为一个初学者，在啃完一遍官方文档并也跟着官方文档的例程（新闻发布系统）做了一遍，决定在将之前练习PHP与MySQL数据库的用户管理系统再用ci框架实现一遍。
主要由三个简单的界面构成：
看起来很简单对不对！没有关系，这不重要~
接下来我们来看代码：
ci的配置我就不用讲了哈，我的配置如下：
database.php 配置文件
'hostname' => 'localhost',
'username' => 'root',
'password' => 'root',
'database' => 'test',
'dbdriver' => 'mysqli',
'dbprefix' => '',
'pconnect' => FALSE,
'db_debug' => (ENVIRONMENT !== 'production'),
'cache_on' => FALSE,
'cachedir' => '',
'char_set' => 'utf8',
'dbcollat' => 'utf8_general_ci',
一定要配置config.php中的base_url，原因你会知道的
$config['base_url'] = 'http://localhost:81/ciDemo/Code/';
接下来是控制器的代码：
我建立了一个user.php的控制器，目录是application/controllers/user.php
<?php /** * 数据库的增删改查 */ class User extends CI_controller { function __construct() { parent::__construct(); $this->load->model('user_model'); // $this->load->helper('url_helper'); $this->load->helper('url'); } public function index() { // $this->load->model('user_model'); $arr = $this->user_model->getAll(); // var_dump($arr); $data['title'] = 'Userlist'; $this->load->view('templates/header', $data); $this->load->view('user/index',array('arr'=>$arr)); $this->load->view('templates/footer'); } public function insert() { $this->load->helper('form'); $data['title'] = 'Create a new user'; // $this->load->model('user_model'); // $arr = array('uaername' => '111','password' => 'md5(222)' ); $this->load->view('templates/header', $data); $this->load->view('user/adduser'); $this->load->view('templates/footer'); } public function insert_ok() { // echo "join"; // if ($this->input->post('submit_user')) { $arr = array( 'username' => $this->input->post('username'), 'password' => md5($this->input->post('password')) ); $query = $this->user_model->user_insert($arr); // var_dump($query); if ($query) { // echo "添加成功"; // $this->index(); redirect('user/index'); } else { echo "添加失败"; } // } } public function update() { $this->load->helper('form'); $data['title'] = 'Update user'; // $this->load->model('user_model'); // $arr = array('uaername' => '111','password' => 'md5(222)' ); $id = $this->uri->segment(3, 0); // echo $id; $arr = $this->user_model->user_select($id); // var_dump($arr); //怎么把指定ID的username传到视图中去 $this->load->view('templates/header', $data); $this->load->view('user/editUser', array('get_username'=>$arr)); $this->load->view('templates/footer'); } public function update_ok() { // $this->load->model('user_model'); // $arr = array('username' => 'kkk','password' => 'md5(333)' ); $arr = array( 'username' => $this->input->post('username'), 'password' => md5($this->input->post('password')) ); // $id = $_GET['id']; //怎么获取ID值？ $id = $this->uri->segment(3, 0); $query = $this->user_model->user_update($id,$arr); if ($query) { // echo "删除成功"; // $this->index(); redirect('user/index'); } else { echo "更新失败"; } } public function delete() { $id = $this->uri->segment(3, 0); // $this->load->model('user_model'); $query = $this->user_model->user_delete($id); if ($query) { // echo "删除成功"; // $this->index(); redirect('user/index'); } else { echo "删除失败"; } } // public function select() // { // // $this->load->model('user_model'); // $arr = $this->user_model->user_select(); // print_r($arr); // echo $arr[0]->id; // } }
模型的代码：
目录是application/models/user_model.php
<?php /** * 数据库增删改查...... */ class User_model extends CI_Model { //构造函数 function __construct() { parent::__construct(); //connect to the database $this->load->database(); //$this->load->insert($t_name,$data) } //所有数据 function getAll() { $res = $this->db->get('user'); return $res->result_array(); } //增加数据 function user_insert($arr) { return $this->db->insert('user', $arr); } //更新数据 function user_update($id,$arr) { $this->db->where('id',$id); return $this->db->update('user',$arr); } //删除数据 function user_delete($id) { $this->db->where('id',$id); return $this->db->delete('user'); } //查找数据 function user_select($id) { $this->db->where('id',$id); $this->db->select('*'); $query = $this->db->get('user'); return $query->result_array(); } }
接下来是视图：
用户列表的视图 application/views/user/index.php
<?php // var_dump($arr); ?> <h2>用户列表<a href="<?php echo site_url('user/insert');?>">添加用户</a></h2> <table border="1" cellspacing="0" cellpadding="0" width="80%" bgcolor="#ABCDEF"> <tr> <td>编号</td> <td>用户名</td> <td>操作</td> </tr> <?php $i=1; foreach($arr as $row):?> <tr> <td><?php echo $i;?></td> <td><?php echo $row['username'];?></td> <td><a href="<?php echo site_url().'/user/update/'.$row['id'];?>">更新</a>|<a href="<?php echo site_url().'/user/delete/'.$row['id'];?>">删除</a></td> </tr> <?php $i++; endforeach;?> </table>
添加用户的视图：application/views/user/adduser.php
<!-- <h2>添加用户</h2> -->
<form action="<?php echo site_url("user/insert_ok");?>" method="post">
<?php //echo form_open('user/insert')?>
<table border="1" cellpadding="0" cellspacing="0" bgcolor="#ABCDEF" width="80%">
<tr>
<td>用户名</td>
<td><input type="text" name="username" id="username" placeholder="请输入合法用户名" required></td>
</tr>
<tr>
<td>密码</td>
<td><input type="password" name="password" id="password" placeholder="请输入密码" required></td>
</tr>
<tr>
<td colspan="2"><input type="submit" value="添加用户" name="submit_user"></td>
</tr>
</table>
</form>
更新用户的视图：application/views/user/edituser.php
<!-- <h2>更新用户</h2> --> <form action="<?php foreach ($get_username as $row):?><?php echo site_url().'/user/update_ok/'.$row['id'];?><?php endforeach;?>" method="post"> <table border="1" cellpadding="0" cellspacing="0" bgcolor="#ABCDEF" width="80%"> <tr> <td>用户名</td> <td><input type="text" name="username" id="" placeholder="请输入合法用户名" required value="<?php foreach ($get_username as $row):?><?php echo $row['username'];?><?php endforeach;?>"></td> </tr> <tr> <td>密码</td> <td><input type="password" name="password" id="" placeholder="请输入密码" required></td> </tr> <tr> <td colspan="2"><input type="submit" value="更新用户"></td> </tr> </table> </form>
为什么我的视图都没有HTML头和尾，因为我把他们分开写在了views视图下的templates文件夹里：
application/views/templates/header.php
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title><?php echo $title; ?></title>
</head>
<body>
<h1><?php echo $title; ?></h1>
application/views/templates/footer.php
<em>© 2016</em>
</body>
</html>