Using the model

While exploring CmsController, we saw that the init() method contained this portion of code:

if ($id_cms = (int) Tools::getValue('id_cms')) {
  $this->cms = new CMS($id_cms,
    $this->context->language->id,
    $this->context->shop->id);
}

This code is important because it selects data from the database for the CMS page with id_cms equaling the id_cms GET variable value. It is a good example for us to review:

if ($id_cms = (int) Tools::getValue('id_cms')) {
}

This code is storing the value of the id_cms GET variable retrieved with the help of Tools::getValue('id_cms'). If the id_cms GET variable doesn’t exist, it won’t work. Feel free to inspect the /classes/Tools.php file if you want to know more about the Tools::getValue(key, $default_value = false) definition.

The following code stores in the $cms variable the CMS object instance extending...