原标题：opencart MVCL运作
导读：
opencart MVC结构核心在于 C（controller）文件里，程序通过它接收信息然后对数据库进行查询、新增、更新、删除等操作。前面文章为大家讲解了opencart程序...
文章目录 [+]
opencart MVC结构核心在于 C（controller）文件里，程序通过它接收信息然后对数据库进行查询、新增、更新、删除等操作。
前面文章为大家讲解了opencart程序后台和前台的控制器文件目录说明，这里就用商品管理控制器（product.php）来为大家说明它是如何调用对应的module文件、view文件以及language文件。
这里我截取了product控制器里的两个方法作为详解：
public function index() {
$this->load->language('catalog/product');
//这里调用admin\language\en-gb\catalog\product.php文件, 这个en-gb是当前网站设置的语言种类，如果是其他语言，则这个要找到对应的语言目录下
$this->document->setTitle($this->language->get('heading_title'));
//$this->language->get('heading_title') 这里以这种方式调用对应的语言包字段'heading_title'
$this->load->model('catalog/product');
//这里调用admin\model\catalog\product.php文件
$this->getList();
}
protected function getList() {
if (isset($this->request->get['filter_name'])) {
$filter_name = $this->request->get['filter_name'];
} else {
$filter_name = '';
}
if (isset($this->request->get['filter_model'])) {
$filter_model = $this->request->get['filter_model'];
} else {
$filter_model = '';
}
if (isset($this->request->get['filter_price'])) {
$filter_price = $this->request->get['filter_price'];
} else {
$filter_price = '';
}
if (isset($this->request->get['filter_quantity'])) {
$filter_quantity = $this->request->get['filter_quantity'];
} else {
$filter_quantity = '';
}
if (isset($this->request->get['filter_status'])) {
$filter_status = $this->request->get['filter_status'];
} else {
$filter_status = '';
}
if (isset($this->request->get['sort'])) {
$sort = $this->request->get['sort'];
} else {
$sort = 'pd.name';
}
if (isset($this->request->get['order'])) {
$order = $this->request->get['order'];
} else {
$order = 'ASC';
}
if (isset($this->request->get['page'])) {
$page = $this->request->get['page'];
} else {
$page = 1;
}
$url = '';
if (isset($this->request->get['filter_name'])) {
$url .= '&filter_name=' . urlencode(html_entity_decode($this->request->get['filter_name'], ENT_QUOTES, 'UTF-8'));
}
if (isset($this->request->get['filter_model'])) {
$url .= '&filter_model=' . urlencode(html_entity_decode($this->request->get['filter_model'], ENT_QUOTES, 'UTF-8'));
}
if (isset($this->request->get['filter_price'])) {
$url .= '&filter_price=' . $this->request->get['filter_price'];
}
if (isset($this->request->get['filter_quantity'])) {
$url .= '&filter_quantity=' . $this->request->get['filter_quantity'];
}
if (isset($this->request->get['filter_status'])) {
$url .= '&filter_status=' . $this->request->get['filter_status'];
}
if (isset($this->request->get['order'])) {
$url .= '&order=' . $this->request->get['order'];
}
if (isset($this->request->get['page'])) {
$url .= '&page=' . $this->request->get['page'];
}
$data['breadcrumbs'] = array();
$data['breadcrumbs'][] = array(
'text' => $this->language->get('text_home'),
'href' => $this->url->link('common/dashboard', 'user_token=' . $this->session->data['user_token'], true)
);
$data['breadcrumbs'][] = array(
'text' => $this->language->get('heading_title'),
'href' => $this->url->link('catalog/product', 'user_token=' . $this->session->data['user_token'] . $url, true)
);
$data['add'] = $this->url->link('catalog/product/add', 'user_token=' . $this->session->data['user_token'] . $url, true);
$data['copy'] = $this->url->link('catalog/product/copy', 'user_token=' . $this->session->data['user_token'] . $url, true);
$data['delete'] = $this->url->link('catalog/product/delete', 'user_token=' . $this->session->data['user_token'] . $url, true);
$data['products'] = array();
$filter_data = array(
'filter_name' => $filter_name,
'filter_model' => $filter_model,
'filter_price' => $filter_price,
'filter_quantity' => $filter_quantity,
'filter_status' => $filter_status,
'sort' => $sort,
'order' => $order,
'start' => ($page - 1) * $this->config->get('config_limit_admin'),
'limit' => $this->config->get('config_limit_admin')
);
$this->load->model('tool/image');
$product_total = $this->model_catalog_product->getTotalProducts($filter_data);
//这里调用product的module文件里的getTotalProducts()方法查询数据
$results = $this->model_catalog_product->getProducts($filter_data);
//这里调用product的module文件里的getProducts()方法查询数据
foreach ($results as $result) {
if (is_file(DIR_IMAGE . $result['image'])) {
$image = $this->model_tool_image->resize($result['image'], 40, 40);
} else {
$image = $this->model_tool_image->resize('no_image.png', 40, 40);
}
$special = false;
$product_specials = $this->model_catalog_product->getProductSpecials($result['product_id']);
//这里调用product的module文件里的getProductSpecials()方法查询数据
foreach ($product_specials as $product_special) {
if (($product_special['date_start'] == '0000-00-00' || strtotime($product_special['date_start']) < time()) && ($product_special['date_end'] == '0000-00-00' || strtotime($product_special['date_end']) > time())) {
$special = $this->currency->format($product_special['price'], $this->config->get('config_currency'));
break;
}
}
$data['products'][] = array(
'product_id' => $result['product_id'],
'image' => $image,
'name' => $result['name'],
'model' => $result['model'],
'price' => $this->currency->format($result['price'], $this->config->get('config_currency')),
'special' => $special,
'quantity' => $result['quantity'],
'status' => $result['status'] ? $this->language->get('text_enabled') : $this->language->get('text_disabled'),
'edit' => $this->url->link('catalog/product/edit', 'user_token=' . $this->session->data['user_token'] . '&product_id=' . $result['product_id'] . $url, true)
);
}
$data['user_token'] = $this->session->data['user_token'];
if (isset($this->error['warning'])) {
$data['error_warning'] = $this->error['warning'];
} else {
$data['error_warning'] = '';
}
if (isset($this->session->data['success'])) {
$data['success'] = $this->session->data['success'];
unset($this->session->data['success']);
} else {
$data['success'] = '';
}
if (isset($this->request->post['selected'])) {
$data['selected'] = (array)$this->request->post['selected'];
} else {
$data['selected'] = array();
}
$url = '';
if (isset($this->request->get['filter_name'])) {
$url .= '&filter_name=' . urlencode(html_entity_decode($this->request->get['filter_name'], ENT_QUOTES, 'UTF-8'));
}
if (isset($this->request->get['filter_model'])) {
$url .= '&filter_model=' . urlencode(html_entity_decode($this->request->get['filter_model'], ENT_QUOTES, 'UTF-8'));
}
if (isset($this->request->get['filter_price'])) {
$url .= '&filter_price=' . $this->request->get['filter_price'];
}
if (isset($this->request->get['filter_quantity'])) {
$url .= '&filter_quantity=' . $this->request->get['filter_quantity'];
}
if (isset($this->request->get['filter_status'])) {
$url .= '&filter_status=' . $this->request->get['filter_status'];
}
if ($order == 'ASC') {
$url .= '&order=DESC';
} else {
$url .= '&order=ASC';
}
if (isset($this->request->get['page'])) {
$url .= '&page=' . $this->request->get['page'];
}
$data['sort_name'] = $this->url->link('catalog/product', 'user_token=' . $this->session->data['user_token'] . '&sort=pd.name' . $url, true);
$data['sort_model'] = $this->url->link('catalog/product', 'user_token=' . $this->session->data['user_token'] . '&sort=p.model' . $url, true);
$data['sort_price'] = $this->url->link('catalog/product', 'user_token=' . $this->session->data['user_token'] . '&sort=p.price' . $url, true);
$data['sort_quantity'] = $this->url->link('catalog/product', 'user_token=' . $this->session->data['user_token'] . '&sort=p.quantity' . $url, true);
$data['sort_status'] = $this->url->link('catalog/product', 'user_token=' . $this->session->data['user_token'] . '&sort=p.status' . $url, true);
$data['sort_order'] = $this->url->link('catalog/product', 'user_token=' . $this->session->data['user_token'] . '&sort=p.sort_order' . $url, true);
$url = '';
if (isset($this->request->get['filter_name'])) {
$url .= '&filter_name=' . urlencode(html_entity_decode($this->request->get['filter_name'], ENT_QUOTES, 'UTF-8'));
}
if (isset($this->request->get['filter_model'])) {
$url .= '&filter_model=' . urlencode(html_entity_decode($this->request->get['filter_model'], ENT_QUOTES, 'UTF-8'));
}
if (isset($this->request->get['filter_price'])) {
$url .= '&filter_price=' . $this->request->get['filter_price'];
}
if (isset($this->request->get['filter_quantity'])) {
$url .= '&filter_quantity=' . $this->request->get['filter_quantity'];
}
if (isset($this->request->get['filter_status'])) {
$url .= '&filter_status=' . $this->request->get['filter_status'];
}
if (isset($this->request->get['sort'])) {
$url .= '&sort=' . $this->request->get['sort'];
}
if (isset($this->request->get['order'])) {
$url .= '&order=' . $this->request->get['order'];
}
$pagination = new Pagination();
$pagination->total = $product_total;
$pagination->page = $page;
$pagination->limit = $this->config->get('config_limit_admin');
$pagination->url = $this->url->link('catalog/product', 'user_token=' . $this->session->data['user_token'] . $url . '&page={page}', true);
$data['pagination'] = $pagination->render();
$data['results'] = sprintf($this->language->get('text_pagination'), ($product_total) ? (($page - 1) * $this->config->get('config_limit_admin')) + 1 : 0, ((($page - 1) * $this->config->get('config_limit_admin')) > ($product_total - $this->config->get('config_limit_admin'))) ? $product_total : ((($page - 1) * $this->config->get('config_limit_admin')) + $this->config->get('config_limit_admin')), $product_total, ceil($product_total / $this->config->get('config_limit_admin')));
$data['filter_name'] = $filter_name;
$data['filter_model'] = $filter_model;
$data['filter_price'] = $filter_price;
$data['filter_quantity'] = $filter_quantity;
$data['filter_status'] = $filter_status;
$data['sort'] = $sort;
$data['order'] = $order;
$data['header'] = $this->load->controller('common/header');
$data['column_left'] = $this->load->controller('common/column_left');
$data['footer'] = $this->load->controller('common/footer');
$this->response->setOutput($this->load->view('catalog/product_list', $data));
//这里的$this->load->view('catalog/product_list', $data) 方法是调用admin\view\template\catalog\product_list.twig文件将以上所有$data数组传入这个模板文件里。
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