noesa-dev-changes.php

<?php
/**
 * Plugin Name: Noesa DEV environment changes
 * Plugin URI: https://gist.github.com/alexmoise/0056c5055c501e343fa22527faf66a71
 * GitHub Plugin URI: https://gist.github.com/alexmoise/0056c5055c501e343fa22527faf66a71
 * Description: A custom plugin to preserve custom changes against updates, for noesa.com dev environment
 * Version: 1.0.0
 * Author: Alex Moise
 * Author URI: https://moise.pro
 */

 
// 01. show first product gallery image as product image in single product page
add_filter( 'woocommerce_single_product_image_thumbnail_html', 'noesa_product_image_new');
function noesa_product_image_new($post_id) {

    global $product;
    $attachment_ids = $product->get_gallery_attachment_ids();

    if ( $attachment_ids ) {
        $attachment_id = $attachment_ids[0];

        $classes = array();
        $image_link = wp_get_attachment_url( $attachment_id );

        if ( $image_link ) {

        $image       = wp_get_attachment_image( $attachment_id, apply_filters( 'single_product_thumbnail_size', 'shop_thumbnail' ) );
        $image_class = esc_attr( implode( ' ', $classes ) );
        $image_title = esc_attr( get_the_title( $attachment_id ) );
        }
    }

    $content = '<a href="' . $image_link . '" itemprop="image" class="woocommerce-main-image zoom" title="' . $image_title . '" data-rel="prettyPhoto">' . $image . '</a>';

    return $content;
}

?>