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To create an app, go to AdminCP -> Apps -> New App -> put {Your_App_ID} on the popup -> Click submit. Then check the folder /PF.Site/Apps/{Your_App_ID}/, you will see some default files and folders there.

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Describe App Structure

• Ajax: This directory contains Ajax handler classes
• assets: This directory contains raw assets such as the images, css, javascript, ...
• Block: This directory contains block classes
• Controller: This directory contains controller classes
• Service: This directory contains service classes
• hooks: This directory contains plugin scripts
• views: This directory contain template scripts
• phrase.json: This file declares language phrases
• icon.png: This is icon of your app
• Install.php: This file contains installation script of your app
• start.php: This file contains bootstrap scripts.

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Add new php class IndexController under directory ./PF.Site/Apps/TodoList/Controller/ paste example code.

<?php

namespace Apps\TodoList\Controller;

// Index controller must be child of \Phpfox_Component class. // class IndexController extends \Phpfox_Component
{
    public function process()
    {

        // Get phpFox core template service         $template = $this-

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>template();

        // set view title         $template-

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>setTitle('To Do List');

        // set view breadcrumb 
        // get url         $url = $this-

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>url()-

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>makeUrl('to-do-list');

        $template-

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>setBreadCrumb('To Do List',$url);

        // add your section menus         $template-

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>buildSectionMenu('to-do-list', [
            'Browse' => $this-

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>url()-

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>makeUrl('/to-do-list'),
            'Create' => $this-

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>url()-

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>makeUrl('/to-do-list/add'),
        ]);
    }
}

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Add new template file index.html.php under /PF.Site/Apps/FirstApp/views/controller, paste following code

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 <p>Hello, to do list home 

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page</p>

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Now we define route to define configurations, edit start.php, paste following code.

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 <?php

namespace Apps\TodoList;

// Load phpFox module service instance, this is core of phpFox service, // module service contains your app configuration. $module =\Phpfox_Module::instance();

// Instead of \Apps\FirstApp every where. Let register an alias `first_app` that map to our app. $module-

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>addAliasNames('todo', 'TodoList');

// Register your controller here $module-

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>addComponentNames('controller', [
        'todo.index' => Controller\IndexController::class,
    ]);

// Register template directory $module-

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>addTemplateDirs([
        'todo' => PHPFOX_DIR_SITE_APPS . 'where/views',
    ]);


route('to-do-list',function (){
    \Phpfox_Module::instance()-

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>dispatch('todo.index');
    return 'controller';    
});

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All your php classes must have namespace Apps\TodoList, This help autoloader know where to load scripts.

Open browse, in address bar append /index.php/to-do-list/, then see the result.

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Add Main Menu

Main menu will be added automatically by phpFox, edit Install.php,

update function setAlias

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 <?php
    protected function setAlias()
    {
        $this-

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>alias = 'todo';
    }

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update function setVersion()

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 <?php
    protected function setVersion()
    {
        $this-

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>version = '4.1.0'; 
    }

update function setOthers

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 <?php
    protected function setOthers()
    {
        $this-

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>menu = [
            "name" => "To Do List",  // Menu label             "url"  => "/to-do-list", // Menu Url             "icon" => "tasks"      // Menu icons, see http://fontawesome.io/icons/         ];
    }

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Then update your app to apply your modification. How to update app configurations Open browser again, see result: 

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Add Buttons

Buttons menu is handle by Template service, you get template service from anywhere using Phpfox::getLib('template'), within controller, service you can invoke method template() to get the Template service.

pasted code into IndexController.php

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 $template->menu('Add To Do', $this->url()->makeUrl('/to-do-list/add'));

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Click on ADD TO DO, a not found page will be shown, The next chapter will guide you how to create new controller to handle Add process, show input form about to do list task, store item to database.