PHP framework development 2 (SPL library and controller)

PHP framework development 2 (SPL library and controller)_PHP tutorial

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Release： 2016-07-13 17:53:04

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According to the directory structure mentioned above (if you are not sure, you can read the previous article). I created a new simple.php.

in the simple folder

[php]

require 'includes/exceptions.php';
require 'includes/autoloader.php';
session_start();

//$view = new view();
lib::set_item('controller' , new controller());
lib::get_item('controller' , lib::PERSIST_STORGE)->render();
//$content = $view->finish();

This chapter mainly talks about SPL, so we only look at the second line of autoloader.php. When we add

to index.php

[php]
require 'simple/simple.php';
after.

Let’s take a look at the source code of autoloader.php

[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');

This class has static methods. When this PHP file is referenced, the program will automatically load the contents of these three folders, so that we do not need to require or include repeatedly. If you don’t know anything about SPL, you can go directly to Baidu. I’m just telling you that this SPL has a wide range of functions.

Then create a new lib.php in the includes folder

[html]
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));
    }
}
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('/' , $path_info);
        if(emptyempty($parts[0])) $parts[0] = 'index';
        if(emptyempty($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!');
        }
    }
}