模拟用户登录验证的案例 依赖注入 Facade
//virefy.php
<?php
//数据库连接类
class Db{
public $databaseType = null;
//获得数据库类型
public function getType($databaseType){
$this->databaseType = $databaseType;
return $this;
}
//验证数据库类型
public function conn(){
if($this->databaseType == 'mysql'){
return '数据库连接成功';
}else{
return '数据库连接失败';
}
}
}
//数据库验证类
class Validate{
protected $username;
protected $password;
//获取数据库用户名和密码
public function getValid($username,$password){
$this->username = $username;
$this->password = $password;
return $this;
}
//验证数据库用户名和密码
public function check(){
if($this->username == 'root' && $this->password == 'root'){
return '验证成功'; }else{ return '验证失败';
}
}
}
//数据显示类
class User{
protected $username;
protected $password;
//获取用户名和密码
public function getUser($username,$password){
$this->username = $username;
$this->password = $password;
return $this;
}
//验证登录用户名和密码
public function login(){
if($this->username == 'admin' && $this->password == 'admin'){
return '用户登录成功';
}else{
return '用户登录失败';
}
}
}
//container.php
<?php
require 'virefy.php';
class Container{
//声明对象数组
public $instance = [];
//绑定类
public function bind($classType,closure $closeFun){
$this->instance[$classType] = $closeFun;
}
//调用容器绑定类方法
public function make($classType,$params = []){
//通过数组赋值的匿名函数返回类对象
return call_user_func_array($this->instance[$classType],$params);
}
}
//声时一个容器实例
$container = new Container;
//绑定Db
$container->bind('Db',function(){ return new Db; });
//绑定Validate
$container->bind('Validate',function(){ return new Validate; });
//绑定User $container->bind('User',function(){ return new User; });
<?php
require 'container.php';
class Facade{
//声明容器类变量
public static $container = null;
//构造容器类赋值
public static function init(Container $container){
self::$container = $container;
}
public static function conn($databaseType){
//返回Db类conn方法
return self::$container->make('Db')->getType($databaseType)->conn();
}
public static function check($username,$password){
//返回Validate类check方法
return self::$container->make('Validate')->getValid($username,$password)->check(); }
public static function login($username,$password){
//返回User类display方法
return self::$container->make('User')->getUser($username,$password)->login();
}
}
//Facade类初始化容器
Facade::init($container);
//Facade类验证数据库类型
echo Facade::conn('mysql').'<br>';
//Facade类验证数据库用户和密码
echo Facade::check('root','root').'<br>';
//Facade类验证登录用户和密码
echo Facade::login('admin','admin').'<br>';