How to create a module in Prestashop 1.7? With the connection of the second site

[Vatson2017]

Works shop on Prestashop 1.7. I want to create a module to connect the product catalog. At the root of the site there is a catalog folder in it is index.php, its own database, there is a site in the site. I want to create a module through which it will be possible to go to the directory from the Prestashop main page, with the site header and footer being displayed from the Prestashop store, and the data from the catalog folder?

[Janett]

https://devdocs.prestashop.com/1.7/modules/

[Vatson2017]

The folder in the directory has a connection file. You may need to fix something?

<?if(!defined("CAT_PROLOG_INCLUDED") || CAT_PROLOG_INCLUDED!==true)die();

require($_SERVER["DOCUMENT_ROOT"].'/config/config.inc.php');



//Add to cart
if(defined('CAT_ADD_TO_CART') AND CAT_ADD_TO_CART){
	global $arCartPrice;
	if(is_array($arCartPrice)){
		if($arCartPrice['OPTIONS']['MINIMUM']>1){$QUANTITY=$arCartPrice['OPTIONS']['MINIMUM'];}else{$QUANTITY=1;}
		$DefaultCategory = 12;
		$DefaultTaxGroup = 0;
		$Price = $arCartPrice['PRICE_CONVERTED'];
		$Reference = $arCartPrice['ARTICLE'].' / '.$arCartPrice['BRAND'];

		//Presta init
		global $context;
		if(!$context){$context = Context::getContext();}
		$logged = $context->cookie->__get('logged');
		$id_cart = $context->cookie->__get('id_cart');
		$id_lang = $context->cookie->__get('id_lang');
		$id_guest = $context->cookie->__get('id_guest');
		$id_currency = $context->cookie->__get('id_currency');

		
                   
<?php


$_GET=Array();
$controller = new FrontController();

$tm=time();

$controller->init();

//echo 'init() '.(time()-$tm).' sec.<br>'; $tm=time();

//$controller->initContent();
//echo 'initContent() '.(time()-$tm).' sec.<br>'; $tm=time();

$controller->setMedia();


//$controller->initHeader();


$context->smarty->tpl_vars['page']->value['page_name'] = 'CATod';
$context->smarty->tpl_vars['page']->value['meta']['title'] = CAT_TITLE;
$context->smarty->tpl_vars['page']->value['meta']['description'] = CAT_DESCRIPTION;
$context->smarty->tpl_vars['page']->value['meta']['keywords'] = CAT_KEYWORDS;
$context->smarty->tpl_vars['page']->value['meta']['robots'] = '';

$controller->displayHeader();


ErShow();
echo $CATContent;