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php框架开发2(SPL库和controller)

Jun 13, 2016 pm 01:14 PM
controller name path php

php框架开发二(SPL库和controller)

根据上话的目录结构(如果不清楚的可以看上一篇)。我在simple文件夹内新建了一个simple.php.

<p>require 'includes/exceptions.php';
require 'includes/autoloader.php';
session_start();</p><p>//$view = new view();
lib::set_item('controller' , new controller());
lib::get_item('controller' , lib::PERSIST_STORGE)->render();
//$content = $view->finish();</p>
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这一章主要是讲SPL,所以我们只看第二行的autoloader.php.当我们在index.php中加入

require 'simple/simple.php';
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之后。

我们看一下autoloader.php的源码

<?php
class autoloader{
	
	public static function includesautoloader($class){
		$path = defined('SIMPLE_PATH') ? SIMPLE_PATH : $_SERVER['DOCUMENT_ROOT'];
		$file_name = $path . '/includes/' . $class . '.php';
		if(is_readable($file_name))
			require $file_name;
	}
	
	public static function modulesautoloader($class){
		$path = defined('SIMPLE_PATH') ? SIMPLE_PATH : $_SERVER['DOCUMENT_ROOT'];
		$file_name = $path . '/modules/' . $class . '.php';
		if(is_readable($file_name))
			require $file_name;
	}
	
	public static function controllerautoloader($class){
		$path = defined('SIMPLE_PATH') ? SIMPLE_PATH : $_SERVER['DOCUMENT_ROOT'];
		$file_name = $path . '/controller/' . $class . '.php';
		if(is_readable($file_name))
			require $file_name;
	}

}

spl_autoload_register('autoloader::includesautoloader');
spl_autoload_register('autoloader::modulesautoloader');
spl_autoload_register('autoloader::controllerautoloader');
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这个类都是静态方法,当引用这个PHP文件后,程序会自动载入这三个文件夹下的内容,这样我们不用重复去required 或include。如果对SPL有不了解的,可以直接去百度,这里只是告诉大家,这个SPL作用相当广。

然后在includes文件夹内新建一个lib.php

<?php
class lib{
	
	const SETTING_ARRAY = true;
	const PERSIST_STORGE = false;
	
	public static function set_item($name , $value , $is_array = false){
		if($is_array){
			$_SESSION[$name]   = array();
			$_SESSION[$name][] = $value;
		}
		else{
			$_SESSION[$name] = $value;
		}
	}
	
	public static function get_item($name , $persist = true){
		$result = null;
		if(isset($_SESSION[$name])){
			$result = $_SESSION[$name];
		}
		if(!$persist){
			unset($_SESSION[$name]);
		}
		return $result;
	}
	
	public static function sendto($url = ''){
		if(empty($url)){
			$url  = '/';
		}
		die(header('Location:' . $url));
	}
}
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这个类目前只用于设置SESSION相关的内容。

当执行到lib::set_item('controller' , new controller());时,这里新建了一个控制器对象,并对象存入SESSION中。

controller.php

<?php
class controller{
	//URL部分
	protected $parts;
	//方法参数
	protected $params;
	
	public function __construct(){
		$this->parts = array();
		$this->analysis();
	}
	
	public function analysis(){
		$path_info = $_SERVER['PATH_INFO'];
		if(substr($path_info , 0 , 1) == '/'){
			$path_info = substr($path_info , 1);
		}
		$parts = explode('/' , $path_info);
		if(empty($parts[0]))  $parts[0] = 'index';
		if(empty($parts[1]))  $parts[1] = 'demo';
		
		$this->parts = $parts;
		array_shift($parts);
		array_shift($parts);
		$this->params = $parts;
	}
	
	public function render(){
		if(!class_exists($this->parts[0])){
			throw new ControllerDoesntExistsException($this->parts[0] . ' not exists!');
		}
		if(!method_exists($this->parts[0] , $this->parts[1])){
			throw new ActionDoesntExistsException($this->parts[0] . 'of ' . $this->parts[1] . ' not exists!');
		}
		
		$new_controller = new $this->parts[0];
		$called = call_user_func_array(array($new_controller , $this->parts[1]) , $this->params);
		if($called === false){
			throw new ActionFailedException($this->parts[0] . 'of ' . $this->parts[1] . ' failed to excute property!');
		}
	}
}
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这个类只用PATH_INFO模式来获取调用的控制器和ACTION,并将参数传递到相应的ACTION方法里。当controller初始化之后,会自动分析PATH_INFO的内容,

lib::get_item('controller' , lib::PERSIST_STORGE)->render();

然后调用render()就会在相应的控制器目录找到控制器和ACTION。

例如我在controller文件夹内新建一个index.php

<?php
class index{
	
	public function demo(){
		echo "sdfsdf";
	}
}
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那么执行http://localhost/index.php/index/demo就会输出"sdfsdf";(这是我的本地路径)。

 

以上代码难度不高,如果没有看懂的同学,请Q我,也可以去PHP官网上去查找相应函数的用法。

下一节相会对视图作一个简单的介绍。

 

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