woocommerce_gallery_thumbnail_size │ filter-hook │ WC 1.0

Usage

add_filter( 'woocommerce_gallery_thumbnail_size', 'wp_kama_woocommerce_gallery_thumbnail_size_filter' );

/**
 * Function for `woocommerce_gallery_thumbnail_size` filter-hook.
 * 
 * @param  $array 
 *
 * @return 
 */
function wp_kama_woocommerce_gallery_thumbnail_size_filter( $array ){

	// filter...
	return $array;
}

$array

-

Where the hook is called

$gallery_thumbnail_size           = apply_filters( 'woocommerce_gallery_thumbnail_size', array( $gallery_thumbnail['width'], $gallery_thumbnail['height'] ) );

$thumbnail_size    = apply_filters( 'woocommerce_gallery_thumbnail_size', array( $gallery_thumbnail['width'], $gallery_thumbnail['height'] ) );

Where the hook is used in WooCommerce