change read more text in archive page depending on post category

With the online php generator I’ve created this code snippet.

$post_categories = get_the_category($post->ID);
$parent_category_name="";

if (!empty($post_categories)) {
    $parent_category = $post_categories[0]->parent ? get_category($post_categories[0]->parent) : $post_categories[0];
    $parent_category_name = $parent_category->name;
}

if ($parent_category_name === 'Apple' || $parent_category_name === 'Strawberry') {

    echo "<span>Apples &amp; Strawberries</span>";
} else {
    echo "<span>Fruits</span>";
}

It really works fine for me.