1.数据库
create database test//可以使用phpMyAdmin创建，格式为uft-general-ci。
create table user(
id int(4) AUTO_INCREMENT PRIMARY KEY,
username varchar(20) not null,
password varchar(20)
)
2.注册页面(18.php)
<html>
<head>
<title>虾米大王使用MVC框架实现的用户登录系统</title>
</head>
<body>
<span>虾米大王使用MVC框架实现的用户登录系统</span>
<form id="form1" name="form1" method="post" action="20.php?act=add_user">
<table>
<caption>注册用户</caption>
<tr>
<td>用户名：</td>
<td><input type="text" name="user_name" id="user_name"></td>
</tr>
<tr>
<td>密码：</td>
<td><input type="password" name="password" id="password"></td>
</tr>
<tr>
<td> </td>
<td><input type="submit" name="button1" value="注册"></td>
</tr>
</table>
</form>
</body>
</html>
3.登录页面(19.php)
<html>
<head>
<title>虾米大王使用MVC框架实现的用户登录系统</title>
</head>
<body>
<span>虾米大王使用MVC框架实现的用户登录系统</span>
<form id="form1" name="form1" method="post" action="20.php?act=login">
<table>
<caption>用户登录</caption>
<tr>
<td>用户名：</td>
<td><input type="text" name="user_name" id="user_name"></td>
</tr>
<tr>
<td>密码：</td>
<td><input type="password" name="password" id="password"></td>
</tr>
<tr>
<td> </td>
<td><input type="submit" name="button1" value="登录"></td>
</tr>
</table>
</form>
</body>
</html>
4.控制器controler(20.php)
<?php
/**
* Created by PhpStorm.
*/
require_once ('17.php'); //引入view（视图层）
$user = new user();
$user_name =@ $_POST['user_name'];
$password =@ $_POST['password'];
if($_GET['act'] == 'login') //GET方式获取
{
if($user->login($user_name,$password))
{
echo "欢迎 ".$_SESSION['user_name']."<br>";
echo "登录成功！";
echo "<a href='20.php?act=logout'>注销</a>";
}
else
{
echo "登录失败!";
}
}
elseif($_REQUEST['act'] == 'logout') // REQUEST方式包含GET和POST的全部数据,
{
$user->logout();
echo "注销成功！";
}
elseif($_GET['act'] == 'add_user')
{
$result = $user->add_user($user_name,$password);
if($result == -1)
{
echo "该用户已存在！<br>";
}
elseif($result == 1)
{
echo "注册成功！";
}
else
{
echo "注册失败!";
}
}
else
{
echo "参数错误！";
}
5.视图层view(17.php)
<?php
/**
* Created by PhpStorm.
*/
require_once ('16.php'); //引入model(模型层)
session_start();
class user
{
var $db;
function __construct()
{
$this->db = new DB("mysql:dbname=test;host=localhost",'root','');
}
function login($user_name,$password)
{
$user = $this->db->get_one("select * from user where username=? and password =?",array($user_name,$password));
if($user)
{
$_SESSION['user_id'] = $user['id'];
$_SESSION['user_name'] = $user['username'];
return true;
}
else
{
return false;
}
}
function logout()
{
unset($_SESSION['user_id']);
unset($_SESSION['user_name']);
session_destroy();
return 1;
}
function add_user($user_name,$password)
{
$bool = $this->db->get_col("select count(1) from user where username=?",array($user_name));
if($bool)
{
return -1;
}
$result = $this->db->insert('user',array('username'=>$user_name,'password'=>$password));
if($result)
{
return 1;
}
else
{
return 0;
}
}
}
6.模型层model(16.php)
<?php
/**
* Created by PhpStorm.
*/
class DB extends PDO // 继承PDO数据库类
{
var $sth;
function execute($sql,$values = array())
{
$this->sth = $this->prepare($sql);
return $this->sth->execute($values);
}
function get_all($sql,$values = array())
{
$this->execute($sql,$values);
return $this->sth->fetchAll();
}
function get_one($sql,$values = array())
{
$this->execute($sql,$values);
return $this->sth->fetch();
}
function get_col($sql,$values = array(),$column_number = 0)
{
$this->execute($sql,$values);
return $this->sth->fetchColumn($column_number);
}
function insert($table,$data)
{
$fields = array_keys($data);
$marks = array_fill(0,count($fields),'?');
$sql = "insert into $table (`".implode('`,`',$fields)."`) values (".implode(",",$marks)." )";
return $this->execute($sql,array_values($data));
}
function update($table,$data,$where)
{
$values = $bits = $wheres = array();
foreach ($data as $k => $v)
{
$bits[] = "`$k` = ?";
$values[] = $v;
}
if(is_array($where))
{
foreach ($where as $c => $v)
{
$wheres[] = "$c = ?";
$values[] = $v;
}
}
else
{
return false;
}
$sql = "update $table set ".implode(',',$bits).' where '.implode(' and ',$wheres);
return $this->execute($sql,$values);
}
function dalete($table,$field,$where)
{
if(empty($where))
{
return false;
}
$this->sth = $this->prepare("delete from $table where $field = ?");
if(is_array($where))
{
foreach ($where as $key => $val)
{
$this->sth->execute(array($val));
}
}
else
{
$this->sth->execute(array($where));
}
}
function table2sql($table)
{
$sql = array();
$sql[] = "drop table if exists `{$table}`;\n";
$create_table = $this->get_one('show create table'.$table);
$sql[] = $create_table[1].";\n\n";
return implode('',$sql);
}
function data2sql($table)
{
$sql = array();
$sql[] = "drop table if exists `{$table}`;\n";
$create_table = $this->get_one('show create table'.$table);
$sql[] = $create_table[1].";\n\n";
$rows = $this->get_all("select * from $table");
$col_count = $this->sth->columnCount();
foreach($rows as $row)
{
$sql[] = "insert into $table values(";
$comma = '';
for($i=0; $i<$col_count; $i++)
{
if(!isset($row[$i]))
{
$sql[] = $comma." NULL";
}
else
{
$sql[] = $comma."'".$row[$i]."''";
}
$comma = ',';
}
$sql[] = ");\n";
}
$sql[] = "\n";
return implode('',$sql);
}
function dump_sql()
{
$sql = array();
foreach ($this->query('show tables') as $row)
{
$sql[] = $this->data2sql($row[0]);
}
return implode('',$sql);
}
}
最后的模型层，get_one,get_col,exceute,insert函数都正常可以使用，其他函数没有亲自测试，尚不知会不会有bug。