Display all categories on product page Prestashop

Question

I need to get list of all categories and their ids on product page in Prestashop (I am using v 1.6.0.9).

I tried to do something like this:

$other_categories = $something->getCategories($this->context->language->id, 1, 100);

foreach($other_categories as something)
{   
    // now if the id of the category isnt "1", display name of category
    if($category->id != "1") { $category->name }
} 

But, this is not working.

$category->name gives me only the name of current open category, not the name of each category in the list. I don't know what to put instead of something? And it works only, when I use $category->getProducts. Here you have my shop (see "related products").

It is my third shop and I am struggling with this problem for two days.

Answer 1

Try-
Add in controller function-

$categoryList = Category::getCategories();

and assign the variable in smarty.

$this->smarty->assign(array(
'displayCategoryList' => $categoryList,
                ));
Add in tpl file-

{$displayCategoryList|@print_r}

Answer 2

In PS 1.6 there is a Category class, it contains some handy static methods usable in your controller: getCategories(...), getNestedCategories(...), getSimpleCategories - these are all static (and public) sou you call them like Category::funcName(...)

For your purpose I thing the best option would be getNestedCategories() which has this header:

public static function getNestedCategories(
   $root_category = null,
   $id_lang = false,
   $active = true,
   $groups = null,
   $use_shop_restriction = true,
   $sql_filter = '',
   $sql_sort = '',
   $sql_limit = ''
)

In your controller you could do something like:

$allCategories = Category::getNestedCategories(null, $this->context->language->id);
$this->context->smarty->assign( 'allCategories' , $allCategories );

Then in your template file something like

{foreach from=$allCategories item=mainCategory}
  <div class="categoryBox">
    <h2>{$mainCategory.name}</h2>
    <p>{$mainCategory.description}</p>  
  </div>
  {foreach from=$mainCategory.children item=subCategory}
    <div class="categoryBox">
      <h3>{$subCategory.name}</h3>
      <p>{$subCategory.description}</p>
    </div>
  {/foreach}

{/foreach}

If you would like to have only subcategories of Home category, you can use getHomeCategories($id_lang, $active = true, $id_shop = false):

$allCategories = Category::getHomeCategories( $this->context->language->id );

Also handy one is static function getCategoryInformations($ids_category, $id_lang = null)
=> VERY useful when you have a list of some particular ids of categories you want to get - you just pass them as array - example of usage:

$myCustomCatIDs = array( 5 , 20 , 7);
$myCustomCats = Category::getCategoryInformations( $myCustomCatIDs );

Answer 3

Have a look at home categories module I tested this module with PS 1.6, it works. You can modify the module's hook to your needs. I've done some personnal modification to have the subcategories displayed too. (Sorry for bad english, not my native language)

Here is my custom php code for the module, storing the category and subcategory items in smarty, and linked to a tpl file.

class Homecategories extends Module
{
    private $_html = '';
    private $_postErrors = array();    
    function __construct()
    {
        $this->name = 'homecategories';
        $this->tab = 'front_office_features';
        $this->version = 1.3;
        $this->author = 'John Stocks';
        $this->need_instance = 0;    
        parent::__construct(); // The parent construct is required for translations    
        $this->page = basename(__FILE__, '.php');
        $this->displayName = $this->l('Homepage Categories for v1.5');
        $this->description = $this->l('Displays categories on your homepage');
    }    
    function install()
    {
        return (parent::install() AND $this->registerHook('home') AND $this->registerHook('header'));
    }
    public function hookHeader()
    {
        Tools::addCSS(($this->_path).'homecategories.css', 'all');
    }
    function hookHome($params)
    {
        global $smarty, $cookie, $link;
        $id_customer = (int)$params['cookie']->id_customer;
        $id_group = $id_customer ? Customer::getDefaultGroupId($id_customer) : _PS_DEFAULT_CUSTOMER_GROUP_;
        $id_lang = (int)$params['cookie']->id_lang;
        $result = Db::getInstance(_PS_USE_SQL_SLAVE_)->ExecuteS('
            SELECT c.*, cl.*
            FROM `'._DB_PREFIX_.'category` c
            LEFT JOIN `'._DB_PREFIX_.'category_lang` cl ON (c.`id_category` = cl.`id_category` AND `id_lang` = '.$id_lang.')
            LEFT JOIN `'._DB_PREFIX_.'category_group` cg ON (cg.`id_category` = c.`id_category`)
            WHERE level_depth > 1 And level_depth < 3
            AND c.`active` = 1
            AND cg.`id_group` = '.$id_group.'
            ORDER BY `level_depth` ASC, c.`position` ASC');    
        $category = new Category(1);
        $nb = intval(Configuration::get('HOME_categories_NBR'));    
        global $link;
        $this->context->smarty->assign(array(
            'categories' => $result, Category::getRootCategories(intval($params['cookie']->id_lang), true),
            'link' => $link));    
        $this->context->smarty->assign(array(
            'category' => $category,
            'lang' => Language::getIsoById(intval($params['cookie']->id_lang)),
        ));
        $result2 = Db::getInstance(_PS_USE_SQL_SLAVE_)->ExecuteS('
            SELECT c.*, cl.* 
            FROM ps_category c 
            LEFT JOIN `ps_category_lang` cl ON (c.`id_category` = cl.`id_category` AND `id_lang` = '.$id_lang.') 
            LEFT JOIN ps_category_group cg ON (cg.`id_category` = c.`id_category`) 
            WHERE level_depth > 2 And level_depth < 4
            AND cg.`id_group` = '.$id_group.'
            AND c.`active` = 1
            ORDER BY `level_depth` ASC, c.`position` ASC ');
        global $link;
        $this->context->smarty->assign(array(
            'subcategories' => $result2, Category::getRootCategories(intval($params['cookie']->id_lang), true),
            'sublink' => $link));

        $this->context->smarty->assign(array(
            'category' => $subcategory,
            'lang' => Language::getIsoById(intval($params['cookie']->id_lang)),
        ));    
        return $this->display(__FILE__, 'homecategories.tpl');
    }
}