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Double foreach in one

 
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ben4523
Smarty n00b


Joined: 18 Mar 2017
Posts: 1

PostPosted: Sat Mar 18, 2017 11:42 am    Post subject: Double foreach in one Reply with quote

I have some problem with a code. I would like to create triple array with all product images but when i foreach my second array the foreach add some undefined value.

This is my code :
Code:

public function getImages($id_lang, $idprod)
    {
        return Db::getInstance()->executeS('
            SELECT image_shop.`cover`, i.`id_image`, il.`legend`, i.`position`
            FROM `'._DB_PREFIX_.'image` i
            '.Shop::addSqlAssociation('image', 'i').'
            LEFT JOIN `'._DB_PREFIX_.'image_lang` il ON (i.`id_image` = il.`id_image` AND il.`id_lang` = '.(int)$id_lang.')
            WHERE i.`id_product` = '.(int)$idprod.'
            ORDER BY `position`'
        );
    }
    public function func_get_images()
    {
        /****************** get products *********************/
                  $products = Db::getInstance()->executeS(
                 'SELECT
                     p.id_product,
                     pl.link_rewrite AS product_link,
                     pl.name AS product_name,
                     cl.link_rewrite AS category_link,
                     c.position,
                     cl.name AS category_name,
                     p.id_category_default
                 FROM '._DB_PREFIX_.'product_lang pl
                 INNER JOIN '._DB_PREFIX_.'product p
                 ON pl.id_product = p.id_product
                 INNER JOIN '._DB_PREFIX_.'category c ON c.id_category = p.id_category_default
                 INNER JOIN '._DB_PREFIX_.'category_lang cl
                 ON cl.id_category = p.id_category_default
                 ORDER BY `position`');
        /******************* /get products********************/
        /****************** get product image *********************/
                 $i=0;
                 foreach ($products as $product_item){
                    //echo $product_item['id_category_default']."\n";
                    $products[$i]['id_product'] = $product_item['id_product'];
                    $products[$i]['id_product_cat'] = $product_item['id_category_default'];
                    if ($product_item['id_category_default'] != 20)
                    {
                        //echo $product_item['id_category_default']."\n";
                        $images = $this->getImages(1, $product_item['id_product']);
                        $y=0;
                        foreach ($images as $images_item){
                                $products[$i][$y]['image_url'] = Tools::getHttpHost(true).__PS_BASE_URI__.$images_item['id_image']."/".$product_item['product_link'].".jpg";
                                $products[$i][$y]['category_name'] = $product_item['category_name'];
                                $products[$i][$y]['legend'] = $images_item['legend'];
                                $y++;
                        }
                        $i++;
                    }
                 }
        /******************* /get product image********************/
                // $this->context->smarty->assign('products', $products);
                // return $this->display(__FILE__, 'displayTop.tpl');
                return $products;
        }

And this is my tpl code
Code:

{foreach from=$products item=product_item}
                                        <br/>  <br/>  <br/>  <br/>  <br/>
                                        <h1>Chagement de cat</h1>
                                        {if $product_item.id_product_cat != 20}
                                          {$i = 0}
                                          {foreach from=$product_item item=product_it}
                                            {$product_item.id_product}
                                            <img src="{$product_it.image_url}">
                                            {$product_it.category_name}
                                            {$product_it.legend}
                                            {$i++}
                                          {/foreach}
                                          {$i}
                                        {/if}
                                      {/foreach}

he work but the second while add more tours. and in my page we have this error
Warning: Illegal string offset 'category_name' ....
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bsmither
Smarty Regular


Joined: 20 Dec 2011
Posts: 98
Location: West Coast

PostPosted: Mon Mar 20, 2017 6:39 pm    Post subject: Reply with quote

I think when you are iterating through $products with foreach(), PHP makes a copy of $products and uses that. Thus, if you want to actually change the elements of the $products array, you need to have the $product_item be associated with the array by reference.

See the PHP manual for foreach control structure.

Code:
foreach ($products as &$product_item){
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