Why I can't print a value found with the debuger?

Graphics Back Label · November 16, 2016

Hi Prestashoppers,

I use the debuger to find some values to print out on my template (I use Smarty).

The debuger find a value (the material) of my product and when I try with the code below doesn't work.

Product name:

<h5 itemprop="name">
{if isset($product.pack_quantity) && $product.pack_quantity}{$product.pack_quantity|intval|cat:' x '}{/if}
<a class="product-name" href="{$product.link|escape:'html':'UTF-8'}" title="{$product.name|escape:'html':'UTF-8'}" itemprop="url" >
{$product.name|truncate:45:'...'|escape:'html':'UTF-8'}{$features.value}

// THERE IS THE CODE //
<p>{$products->features}</p> 

// I TRIED WITH THIS TOO //
<p>{features->value}</p>

</a>
</h5>

Please find the debuger result attached: I want to display the "Belize Cotton & Cashmere" value

Best regards

AlexNDR.mac · November 16, 2016

in Smarty syntax {$product->features} - doesn`t work. You need use this syntax {$product.features}

$product.features - is two-dimensions array()

So, you need to use iteration method to get the properties of array. For example: foreach, while...

Graphics Back Label · November 17, 2016

in Smarty syntax {$product->features} - doesn`t work. You need use this syntax {$product.features}

$product.features - is two-dimensions array()

So, you need to use iteration method to get the properties of array. For example: foreach, while...

I have tried this, but I'm not so good in PHP, can you please teach me how to deal with this, using this problem to teach?

For example the following code doesn't work too:

    {if isset($features) && $features}
        <!-- Data sheet -->
        <section class="page-product-box">
            <h3 class="page-product-heading">{l s='Data sheet'}</h3>
            <table class="table-data-sheet">
                {foreach from=$features item=feature}
                <tr class="{cycle values="odd,even"}">
                    {if isset($feature.value)}
                    <td>{$feature.name|escape:'html':'UTF-8'}</td>
                    <td>{$feature.value|escape:'html':'UTF-8'}</td>
                    {/if}
                </tr>
                {/foreach}
            </table>
        </section>
        <!--end Data sheet -->
    {/if}

Best regards,

Edited November 17, 2016 by Graphics Back Label (see edit history)

AlexNDR.mac · November 17, 2016

Ok. I`ll try to show you with your example. But not today, because I don`t have free time now.

Graphics Back Label · November 17, 2016

Ok. I`ll try to show you with your example. But not today, because I don`t have free time now.

Many thanks!

AlexNDR.mac · November 25, 2016

Task for example: I`ll print feature name and value after product name on the product page.
Let`s go - open file product.tpl and find var {$product.name ....}
Next - i`ll try to print features array for understanding how it looks. After <h1> i print features var...

<h1 itemprop="name">{$product->name|escape:'html':'UTF-8'}</h1>
{$features|@var_dump}

and we see this result:

Next, i print one feature name and value after product name.

<h1 itemprop="name">{$product->name|escape:'html':'UTF-8'} | {$features[0].name} - {$features[0].value} </h1>

$features - it`s simple array(), use Smarty documentation for understanding how work with arrays.

Graphics Back Label · November 25, 2016

Task for example: I`ll print feature name and value after product name on the product page.

Let`s go - open file product.tpl and find var {$product.name ....}

Next - i`ll try to print features array for understanding how it looks. After <h1> i print features var...
<h1 itemprop="name">{$product->name|escape:'html':'UTF-8'}</h1>
{$features|@var_dump}
and we see this result:

Next, i print one feature name and value after product name.
<h1 itemprop="name">{$product->name|escape:'html':'UTF-8'} | {$features[0].name} - {$features[0].value} </h1>
$features - it`s simple array(), use Smarty documentation for understanding how work with arrays.

I have tried, and unfortunately this doesn't work (at least, on the product list, where you can see all the products together)

But I learned how to display something in a specific array.

I can't figure out why with the debuger I can find the value, but I can't display it!

The code {$features|@var_dump} give a "Null" output..

AlexNDR.mac · November 25, 2016

In the product_list.tpl var $products contains product array.
Structure of the array is next:

array (size=7)
  0 => 
    array (size=83)
      'id_product' => string '1' (length=1)
      'id_supplier' => string '1' (length=1)
      'id_manufacturer' => string '1' (length=1)
      'id_category_default' => string '5' (length=1)
      'id_shop_default' => string '1' (length=1)
      'id_tax_rules_group' => string '1' (length=1)
      'on_sale' => string '0' (length=1)
      'online_only' => string '0' (length=1)
      'ean13' => string '0' (length=1)
      'upc' => string '' (length=0)
      'ecotax' => string '0.000000' (length=8)
      'quantity' => int 299
      'minimal_quantity' => string '1' (length=1)
      'price' => float 19.2
      'wholesale_price' => string '5.000000' (length=8)
      'unity' => string '' (length=0)
      'unit_price_ratio' => string '0.000000' (length=8)
      'additional_shipping_cost' => string '0.00' (length=4)
      'reference' => string 'demo_1' (length=6)
      'supplier_reference' => string '' (length=0)
      'location' => string '' (length=0)
      'width' => string '0.000000' (length=8)
      'height' => string '0.000000' (length=8)
      'depth' => string '0.000000' (length=8)
      'weight' => string '0.000000' (length=8)
      'out_of_stock' => string '2' (length=1)
      'quantity_discount' => string '0' (length=1)
      'customizable' => string '0' (length=1)
      'uploadable_files' => string '0' (length=1)
      'text_fields' => string '0' (length=1)
      'active' => string '1' (length=1)
      'redirect_type' => string '404' (length=3)
      'id_product_redirected' => string '0' (length=1)
      'available_for_order' => string '1' (length=1)
      'available_date' => string '0000-00-00' (length=10)
      'condition' => string 'new' (length=3)
      'show_price' => string '1' (length=1)
      'indexed' => string '1' (length=1)
      'visibility' => string 'both' (length=4)
      'cache_is_pack' => string '0' (length=1)
      'cache_has_attachments' => string '0' (length=1)
      'is_virtual' => string '0' (length=1)
      'cache_default_attribute' => string '1' (length=1)
      'date_add' => string '2015-11-16 14:34:38' (length=19)
      'date_upd' => string '2016-09-09 11:16:11' (length=19)
      'advanced_stock_management' => string '0' (length=1)
      'pack_stock_type' => string '3' (length=1)
      'id_shop' => string '1' (length=1)
      'id_lang' => string '1' (length=1)
      'description' => string '<p>Fashion has been creating well-designed collections since 2010. The brand offers feminine designs delivering stylish separates and statement dresses which has since evolved into a full ready-to-wear collection in which every item is a vital part of a woman's wardrobe. The result? Cool, easy, chic looks with youthful elegance and unmistakable signature style. All the beautiful pieces are made in Italy and manufactured with the greatest attention. Now Fashion extends to a range of accessories including sho'... (length=541)
      'description_short' => string '<p>Faded short sleeve t-shirt with high neckline. Soft and stretchy material for a comfortable fit. Accessorize with a straw hat and you're ready for summer!</p>' (length=161)
      'link_rewrite' => string 'faded-short-sleeve-tshirts' (length=26)
      'meta_description' => string '' (length=0)
      'meta_keywords' => string '' (length=0)
      'meta_title' => string '' (length=0)
      'name' => string 'Faded Short Sleeve T-shirts' (length=27)
      'available_now' => string 'In stock' (length=8)
      'available_later' => string '' (length=0)
      'id_image' => string '1-1' (length=3)
      'legend' => string '' (length=0)
      'manufacturer_name' => string 'Fashion Manufacturer' (length=20)
      'id_product_attribute' => int 1
      'new' => string '0' (length=1)
      'product_attribute_minimal_quantity' => string '1' (length=1)
      'allow_oosp' => int 0
      'category' => string 'tshirts' (length=7)
      'link' => string 'http://someURL/1-faded-short-sleeve-tshirts.html' (length=73)
      'attribute_price' => float 0
      'price_tax_exc' => float 16
      'price_without_reduction' => float 19.2
      'reduction' => float 0
      'specific_prices' => boolean false
      'quantity_all_versions' => int 1799
      'features' => 
        array (size=3)
          0 => 
            array (size=3)
              ...
          1 => 
            array (size=3)
              ...
          2 => 
            array (size=3)
              ...
      'attachments' => 
        array (size=0)
          empty
      'virtual' => int 0
      'pack' => int 0
      'packItems' => 
        array (size=0)
          empty
      'nopackprice' => int 0
      'customization_required' => boolean false
      'rate' => float 20
      'tax_name' => string '20%' (length=10)
      'color_list' => string

Features are also ARRAY! So, you need write like this: {$product.features[0].name} {$product.features[0].value} for example.

See in my picture bellow - Product Name (Feature Name: Feature Value)

Graphics Back Label · November 25, 2016

In the product_list.tpl var $products contains product array.

Structure of the array is next:

array (size=7)
  0 => 
    array (size=83)
      'id_product' => string '1' (length=1)
      'id_supplier' => string '1' (length=1)
      'id_manufacturer' => string '1' (length=1)
      'id_category_default' => string '5' (length=1)
      'id_shop_default' => string '1' (length=1)
      'id_tax_rules_group' => string '1' (length=1)
      'on_sale' => string '0' (length=1)
      'online_only' => string '0' (length=1)
      'ean13' => string '0' (length=1)
      'upc' => string '' (length=0)
      'ecotax' => string '0.000000' (length=8)
      'quantity' => int 299
      'minimal_quantity' => string '1' (length=1)
      'price' => float 19.2
      'wholesale_price' => string '5.000000' (length=8)
      'unity' => string '' (length=0)
      'unit_price_ratio' => string '0.000000' (length=8)
      'additional_shipping_cost' => string '0.00' (length=4)
      'reference' => string 'demo_1' (length=6)
      'supplier_reference' => string '' (length=0)
      'location' => string '' (length=0)
      'width' => string '0.000000' (length=8)
      'height' => string '0.000000' (length=8)
      'depth' => string '0.000000' (length=8)
      'weight' => string '0.000000' (length=8)
      'out_of_stock' => string '2' (length=1)
      'quantity_discount' => string '0' (length=1)
      'customizable' => string '0' (length=1)
      'uploadable_files' => string '0' (length=1)
      'text_fields' => string '0' (length=1)
      'active' => string '1' (length=1)
      'redirect_type' => string '404' (length=3)
      'id_product_redirected' => string '0' (length=1)
      'available_for_order' => string '1' (length=1)
      'available_date' => string '0000-00-00' (length=10)
      'condition' => string 'new' (length=3)
      'show_price' => string '1' (length=1)
      'indexed' => string '1' (length=1)
      'visibility' => string 'both' (length=4)
      'cache_is_pack' => string '0' (length=1)
      'cache_has_attachments' => string '0' (length=1)
      'is_virtual' => string '0' (length=1)
      'cache_default_attribute' => string '1' (length=1)
      'date_add' => string '2015-11-16 14:34:38' (length=19)
      'date_upd' => string '2016-09-09 11:16:11' (length=19)
      'advanced_stock_management' => string '0' (length=1)
      'pack_stock_type' => string '3' (length=1)
      'id_shop' => string '1' (length=1)
      'id_lang' => string '1' (length=1)
      'description' => string '<p>Fashion has been creating well-designed collections since 2010. The brand offers feminine designs delivering stylish separates and statement dresses which has since evolved into a full ready-to-wear collection in which every item is a vital part of a woman's wardrobe. The result? Cool, easy, chic looks with youthful elegance and unmistakable signature style. All the beautiful pieces are made in Italy and manufactured with the greatest attention. Now Fashion extends to a range of accessories including sho'... (length=541)
      'description_short' => string '<p>Faded short sleeve t-shirt with high neckline. Soft and stretchy material for a comfortable fit. Accessorize with a straw hat and you're ready for summer!</p>' (length=161)
      'link_rewrite' => string 'faded-short-sleeve-tshirts' (length=26)
      'meta_description' => string '' (length=0)
      'meta_keywords' => string '' (length=0)
      'meta_title' => string '' (length=0)
      'name' => string 'Faded Short Sleeve T-shirts' (length=27)
      'available_now' => string 'In stock' (length=8)
      'available_later' => string '' (length=0)
      'id_image' => string '1-1' (length=3)
      'legend' => string '' (length=0)
      'manufacturer_name' => string 'Fashion Manufacturer' (length=20)
      'id_product_attribute' => int 1
      'new' => string '0' (length=1)
      'product_attribute_minimal_quantity' => string '1' (length=1)
      'allow_oosp' => int 0
      'category' => string 'tshirts' (length=7)
      'link' => string 'http://someURL/1-faded-short-sleeve-tshirts.html' (length=73)
      'attribute_price' => float 0
      'price_tax_exc' => float 16
      'price_without_reduction' => float 19.2
      'reduction' => float 0
      'specific_prices' => boolean false
      'quantity_all_versions' => int 1799
      'features' => 
        array (size=3)
          0 => 
            array (size=3)
              ...
          1 => 
            array (size=3)
              ...
          2 => 
            array (size=3)
              ...
      'attachments' => 
        array (size=0)
          empty
      'virtual' => int 0
      'pack' => int 0
      'packItems' => 
        array (size=0)
          empty
      'nopackprice' => int 0
      'customization_required' => boolean false
      'rate' => float 20
      'tax_name' => string '20%' (length=10)
      'color_list' => string

Features are also ARRAY! So, you need write like this: {$product.features[0].name} {$product.features[0].value} for example.

See in my picture bellow - Product Name (Feature Name: Feature Value)

Good it works now!

Can I do ask you why written $product instead of $productS?

The last question: what is the difference between -> and the dot (.) ? I can't find the right documentation

Regards,

AlexNDR.mac · November 25, 2016

$products - it`s multidimensional array(), it contains many arrays in single array.

$products = array(
  0 => 
    array (
      'id_product' => 1,
      'name' => 'name1',
      ....),
  1 => 
    array (
      'id_product' => 2,
      'name' => 'name2',
      ....),
  ....
);

So, you can access to item 'name' by array index: $products[1]['name'] –> display 'name2'

Or:

foreach($products as $product) {
    $product_name = $product['name];
}

Variable $product_name will contains values 'name' –> name1, name2... ect...

Presta use second way but in this case PHP create the copy of array... sometimes

Your second questions about Object Oriented Programming.

"–>" - It`s like a special variable and it refers to the member variable inside object. The official PHP name is "object operator".

It`s came from C++ and how works with memory in direct.

"." - it`s almost same, but in JAVA style

In C++ you can create object in stack or heap. And you can work with memory directly. PHP can`t work with memory directly.

For example:

// C++
#include <iostream>

class Point {
    private:
        double x;
        double y;
    public:
        Point(double x=0, double y=0) {
           this->x = x;
           this->y = y;
        }
        ~Point();

        double getX() const {
           return this->x;
        }
        double getY() const {
           return this->x;
        }
};

int main() {
    Point* pointA = new Point(3.00, 5.89);

    std::cout << "Point A: x = " << (*pointA).getX() << std::cout << std::endl;

    delete pointA;

    return 0;
}

same in PHP:

<?php    
    class Point {
        private $x;
        private $y;
        
        public function __construct ($x = 0, $y = 0) {
            $this->x = $this->validate($x);
            $this->y = $this->validate($y);
        }
        
        public function __destruct() {}
        
        private function validate($num) {
            if(is_numeric($num)) {
                return $num;
            }
            throw new Exception('Invalid param');
        }
        
        public function __get($name) {
            if ( property_exists($this, $name) ) {
                return $this->$name;
            }
            throw new Exception("Attribute error: attribute $name not found");
        }
        
        public function __set($name, $value) {
            if ( property_exists($this, $name) ) {
                $this->$name = $this->validate($value);
            }
            throw new Exception("Attribute error: attribute $name not found");
        }
        
        public function __toString() {
            return sprintf("(%g, %g)", $this->x, $this->y);
        }
        public function doSomething() {
            echo 'Something strange....';
        }

    }
    
    $pointA = new Point(3.0, 5.89);
    
    echo 'Point A:' . $pointA . PHP_EOL;
    $pointA->doSomething();
    
    unset($pointA);
?>

Right documentation: php.net

Edited November 25, 2016 by AlexNDR.mac (see edit history)

Graphics Back Label · November 28, 2016

Really good explanation! Thank you so much!

The last question, in the .tpl where I inserted have no foreach codes, and the debug show me that the variable are called $productS instead of $product like you show to me.

Why you use $product?

AlexNDR.mac · November 28, 2016

debug show you variable and it`s values. Of course variable has named as $products.

But... to access the value, you need write like this - $products[0]['product_id'] or use cycle (iteration).

In this case we use $products

for ($i = 0; $ < $endOfProducts; $i++) {
   echo $products[$i]['name'];
}

In templates use other constructions: foreach ($names as $name)

foreach ($products as $product) {
    echo $product['name'];
}

see more info about this construction in php.net

Why I can't print a value found with the debuger?

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