phpcms程序加载主线

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前台入口index.php

加载base.php

此时是定义了系统参数，如下

//PHPCMS框架路径
define('PC_PATH', dirname(__FILE__).DIRECTORY_SEPARATOR);

if(!defined('PHPCMS_PATH')) define('PHPCMS_PATH', PC_PATH.'..'.DIRECTORY_SEPARATOR);

//缓存文件夹地址
define('CACHE_PATH', PHPCMS_PATH.'caches'.DIRECTORY_SEPARATOR);
//主机协议
define('SITE_PROTOCOL', isset($_SERVER['SERVER_PORT']) && $_SERVER['SERVER_PORT'] == '443' ? 'https://' : 'http://');
//当前访问的主机名
define('SITE_URL', (isset($_SERVER['HTTP_HOST']) ? $_SERVER['HTTP_HOST'] : ''));
//来源
define('HTTP_REFERER', isset($_SERVER['HTTP_REFERER']) ? $_SERVER['HTTP_REFERER'] : '');

//系统开始时间
define('SYS_START_TIME', microtime());

//加载公用函数库
pc_base::load_sys_func('global');
pc_base::load_sys_func('extention');
pc_base::auto_load_func();

pc_base::load_config('system','errorlog') ? set_error_handler('my_error_handler') : error_reporting(E_ERROR | E_WARNING | E_PARSE);
//设置本地时差
function_exists('date_default_timezone_set') && date_default_timezone_set(pc_base::load_config('system','timezone'));

define('CHARSET' ,pc_base::load_config('system','charset'));
//输出页面字符集
header('Content-type: text/html; charset='.CHARSET);

define('SYS_TIME', time());
//定义网站根路径
define('WEB_PATH',pc_base::load_config('system','web_path'));
//js 路径
define('JS_PATH',pc_base::load_config('system','js_path'));
//css 路径
define('CSS_PATH',pc_base::load_config('system','css_path'));
//img 路径
define('IMG_PATH',pc_base::load_config('system','img_path'));
//动态程序路径
define('APP_PATH',pc_base::load_config('system','app_path'));

//应用静态文件路径
define('PLUGIN_STATICS_PATH',WEB_PATH.'statics/plugin/');

if(pc_base::load_config('system','gzip') && function_exists('ob_gzhandler')) {
	ob_start('ob_gzhandler');
} else {
	ob_start();
}

 

接下来是调用pc_base::create_app()

pc_base::create_app() -->pc_base::load_sys_class('application')-->pc_base::_load_class('application',$path|'/libs/classes/')

上面这一条路径是base.php中函数调用，就为了一个目的，加载application.class.php类

 

下面看一下application.class.php中做了些什么

首先，看一下构造函数

/**
	 * 构造函数
	 */
	public function __construct() {
		$param = pc_base::load_sys_class('param');
		define('ROUTE_M', $param->route_m());
		define('ROUTE_C', $param->route_c());
		define('ROUTE_A', $param->route_a());
		$this->init();
	}

 这里，首先加载了param.class.php  参数配置类，对路由、$GET $POST $REQUEST $COOKIE等一些全局变量进行了初始化配置。

 

然后是调用了application类内部init()函数，调用事件。

	/**
	 * 调用事件
	 */
	private function init() {
		$controller = $this->load_controller();
		if (method_exists($controller, ROUTE_A)) {
			if (preg_match('/^[_]/i', ROUTE_A)) {
				exit('You are visiting the action is to protect the private action');
			} else {
				call_user_func(array($controller, ROUTE_A));
			}
		} else {
			exit('Action does not exist.');
		}
	}

init() 调用了 加载控制器方法，这里将控制器模版文件包含进来。

/**
	 * 加载控制器
	 * @param string $filename
	 * @param string $m
	 * @return obj
	 */
	private function load_controller($filename = '', $m = '') {
		if (empty($filename)) $filename = ROUTE_C;
		if (empty($m)) $m = ROUTE_M;
		$filepath = PC_PATH.'modules'.DIRECTORY_SEPARATOR.$m.DIRECTORY_SEPARATOR.$filename.'.php';
		if (file_exists($filepath)) {
			$classname = $filename;
			include $filepath;
			if ($mypath = pc_base::my_path($filepath)) {
				$classname = 'MY_'.$filename;
				include $mypath;
			}
			if(class_exists($classname)){
				return new $classname;
			}else{
				exit('Controller does not exist.');
 			}
		} else {
			exit('Controller does not exist.');
		}
	}