How to create a dynamic variable

Dynamic variables allow you to customize product data using PHP scripts stored on your server. These variables can be used in feed templates to modify or extend product attributes dynamically.

Create a new dynamic variable

1. Create a new variable in Magento

• Navigate to Catalog -> Advanced Product Feeds -> Dynamic variables.
• Click Add variable and fill in the following fields:
  • Set the name of the variable.
  • Set the unique identifier for the variable (used in feed templates).

2. Add PHP code for the variable

• Log in to your Magento server.

• Navigate to one of the following directories:

  • var/mst_feed/
  • app/code/Mirasvit/Feed/ (recommended for Magento Cloud)

• Create a new PHP file with the exact name as the variable code.

  Example

  If the Variable Code is gtin_variable, create var/mst_feed/gtin_variable.php.

• Write your PHP code inside the file.

Note

Use echo instead of return to output the value.

3. Validate and Use the Variable*

• Save the variable and reload the Magento admin page.
• The code section will display the PHP script fetched from the server.
• To test the variable, enter product IDs in the preview field.
• Use the variable in templates with:

  {{ product.variable:your_variable_code }}

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Example of dynamic variables

Get correct GTIN

Name: GTIN
Code: gtin
PHP code:

<?php
$gtin = $product->getGtin();
if (!$gtin) {
    $gtin = $product->getId();
    $gtin .= str_repeat('0', 12 - strlen($gtin));
}
echo $gtin;
?>

Usage in feed template:

{{ product.variable:gtin }}

Output:

124200000000

Add 20% to the final price

Name: Add percentage
Code: percentage
PHP code:

<?php
$price = $product->getFinalPrice();
echo number_format($price * 1.2, 2);
?>

Usage in feed template:

{{ product.variable:percentage }}

Get total stock quantity across all sources

Name: Summary stocks qty
Code: sum_stocks_qty
PHP code:

<?php
$sourcesData = $objectManager->get('\Magento\InventoryCatalogAdminUi\Model\GetSourceItemsDataBySku')
    ->execute($product->getSku());

$sumQty = 0;

foreach ($sourcesData as $sourceData) {
    $sumQty += $sourceData['quantity'];
}

echo $sumQty;

Usage in feed template:

{{ product.variable:sum_stocks_qty }}

Display special price only if it's lower than regular price

Name: Custom special price
Code: custom_spec_price
PHP Code:

<?php
$finalPrice = $product->getFinalPrice();
$regularPrice = $product->getPrice();

if ($finalPrice < $regularPrice) {
    echo number_format($finalPrice, 2);
} else {
    echo '';
}
?>

Usage in feed template:

{{ product.variable:custom_spec_price }}