Smart Variations Images is a powerful plugin for WooCommerce that enhances the way product variations are displayed. It provides developers with various customization options, including the ability to modify image data using filters.

How Filters Work in Smart Variations Images

Filters in Smart Variations Images allow developers to hook into specific points in the plugin’s code and modify image data according to their specific requirements. One such custom filter provided by the plugin is svi_image.

Practical Example: Modifying Images on the Single Product Page

Let’s consider a practical scenario where we want to modify the images displayed on the single product page in WooCommerce using Smart Variations Images. For example, we may want to exclude the featured image from being displayed among the product images.

Steps to Implement the Custom Filter

1. Identify the Custom Filter: Smart Variations Images provides a custom filter named svi_image, which developers can use to modify image data before it’s displayed on the single product page.
2. Define a Filter Callback Function: Developers need to define a custom filter callback function that will be invoked when the svi_image filter is applied. This function receives the image data as a parameter and can modify it as needed.
3. Check and Modify Image Data: Within the filter callback function, developers can inspect the image data and apply any modifications according to their requirements. For example, they can check if the image is the featured image and exclude it from being displayed.
4. Hook the Filter Function: Finally, developers hook their custom filter callback function into the svi_image filter using the add_filter() function. This ensures that their function is executed whenever the svi_image filter is applied.

Example: Modifying Images on the Single Product Page

Let’s say you want to exclude the featured image from being displayed among the product images on the single product page in WooCommerce using Smart Variations Images. You can achieve this by implementing the svi_image filter and defining a custom filter callback function.

Here’s how you can do it:

1. Define the Filter Callback Function:

   // Define a custom filter callback function
   function exclude_featured_image($img_data) {
   // Check if the current image is the featured image
   if ($img_data['product_img']) {
   // If it's the featured image, return null to exclude it
   return null;
   }
   
   // Return the image data as is for non-featured images
   return $img_data;
   }

    

2. Hook the Filter Function:

   // Hook the custom filter callback function into the svi_image filter
   add_filter('svi_image', 'exclude_featured_image', 10, 1);

With this code, the exclude_featured_image function is executed whenever the svi_image filter is applied. It checks if the current image being processed is the featured image ($img_data['product_img']), and if so, it returns null to exclude it from being displayed among the product images.

By adding these code snippets to your theme’s functions.php file or a custom plugin, you can effectively modify the images displayed on the single product page in WooCommerce using Smart Variations Images.

Feel free to customize the filter callback function according to your specific requirements or additional logic you may need.