PHP-MVC framework class implementation

1.4 Framework class implementation

1.4.1 constants defined path

Since the file path high frequency of use, and the long path, so the path of the fixed path defined constants

Knowledge Point

1、getcwd()：入口文件的绝对路径
2、windows下默认的目录分隔符是`\`，Linux下默认的目录分隔符是`/`。DIRECTORY_SEPARATOR常量根据不同的操作系统返回不同的目录分隔符。

Code

Created under the Core folder Framework.class.php

private static function initConst(){
    define('DS', DIRECTORY_SEPARATOR);  //定义目录分隔符
    define('ROOT_PATH', getcwd().DS);  //入口文件所在的目录
    define('APP_PATH', ROOT_PATH.'Application'.DS);   //application目录
    define('CONFIG_PATH', APP_PATH.'Config'.DS);
    define('CONTROLLER_PATH', APP_PATH.'Controller'.DS);
    define('MODEL_PATH', APP_PATH.'Model'.DS);
    define('VIEW_PATH', APP_PATH.'View'.DS);
    define('FRAMEWORK_PATH', ROOT_PATH.'Framework'.DS);
    define('CORE_PATH', FRAMEWORK_PATH.'Core'.DS);
    define('LIB_PATH', FRAMEWORK_PATH.'Lib'.DS);
    define('TRAITS_PATH', ROOT_PATH.'Traits'.DS);
}

1.4.2 introduced profile

1. Create config.php in the config directory

<?php
return array(
    //数据库配置
    'database'=>array(),
    //应用程序配置
    'app'       =>array(
        'dp'    =>  'Admin',        //默认平台
        'dc'    =>  'Products',     //默认控制器
        'da'    =>  'list'          //默认方法
    ),
);

2, is introduced in the frame profile class

private static function initConfig(){
   $GLOBALS['config']=require CONFIG_PATH.'config.php';
}

Question: Why is not stored in the configuration file constants?

A: Because before 7.0, constants arrays and objects can not be saved.

1.4.3 determine the route

p: [platform] platform

c: controller [controller]

a: action [Method]

private static function initRoutes(){
    $p=$_GET['p']??$GLOBALS['config']['app']['dp'];
    $c=$_GET['c']??$GLOBALS['config']['app']['dc'];
    $a=$_GET['a']??$GLOBALS['config']['app']['da'];
    $p=ucfirst(strtolower($p));
    $c=ucfirst(strtolower($c));		//首字母大写
    $a=strtolower($a);			//转成小写
    define('PLATFROM_NAME', $p);    //平台名常量
    define('CONTROLLER_NAME', $c);  //控制器名常量
    define('ACTION_NAME', $a);      //方法名常量
    define('__URL__', CONTROLLER_PATH.$p.DS);   //当前请求控制器的目录地址
    define('__VIEW__',VIEW_PATH.$p.DS);     //当前视图的目录地址
}

1.4.4 Automatic load class

private static function initAutoLoad(){
    spl_autoload_register(function($class_name){
        $namespace= dirname($class_name);   //命名空间
        $class_name= basename($class_name); //类名
        if(in_array($namespace, array('Core','Lib')))   //命名空间在Core和Lib下
            $path= FRAMEWORK_PATH.$namespace.DS.$class_name.'.class.php';
        elseif($namespace=='Model')     //文件在Model下
            $path=MODEL_PATH.$class_name.'.class.php';
        elseif($namespace=='Traits')    //文件在Traits下
            $path=TRAITS_PATH.$class_name.'.class.php';
        else   //控制器
            $path=CONTROLLER_PATH.PLATFROM_NAME.DS.$class_name.'.class.php'; 
        if(file_exists($path) && is_file($path))
            require $path;
    });
}

1.4.5 request distribution

private static function initDispatch(){
    $controller_name='\Controller\\'.PLATFROM_NAME.'\\'.CONTROLLER_NAME.'Controller';	//拼接控制器类名
    $action_name=ACTION_NAME.'Action';	//拼接方法名
    $obj=new $controller_name();
    $obj->$action_name();
} 

1.4.6 Packaging run () method

class Framework{
    //启动框架
    public static function run(){
        self::initConst();
        self::initConfig();
        self::initRoutes();
        self::initAutoLoad();
        self::initDispatch();
    }
    ...

1.4.7 call inlet run () method

<?php
require './Framework/Core/Framework.class.php';
Framework::run();

run () method call after the start of the frame.