Remove string with REGEX

function pm_get_matching_group() {
    return '(?:4-4s|5-5s-se|5c|6-6s|6-plus-6s-plus|7-et-7-plus|7-7-plus|8-et-8-plus|8-8-plus|x-xs|xs-max|xr?)';
}

function pm_filter_product_permalinks($permalink, $slug, $post, $native_slug, $native) {
    if(!empty($post->post_type) && $post->post_type == 'product') {
        $matching_group = pm_get_matching_group();

        // $permalink = preg_replace("/([^\/]+)-coque-iphone-{$matching_group}(\/[^\/]+)$/", '$1$3', $permalink);
        // $permalink = preg_replace("/coque-iphone-{$matching_group}-([^\/]+)$/", '$2', $permalink);

        $permalink = preg_replace("/([^\/]+)?(coque-iphone-{$matching_group})([^\/]+)?(\/[^\/]+)$/", '$1$3$4', $permalink);

        $permalink = preg_replace('/([-]+)/', '-', $permalink);
        $permalink = preg_replace('/(\/([-]+)|([-]+)\/)/', '/', $permalink);
    }

    return $permalink;
}
add_filter('permalink_manager_filter_default_post_uri', 'pm_filter_product_permalinks', 9, 5);

function pm_filter_product_slugs($slug, $post) {
    if(!empty($post->post_type) && $post->post_type == 'product') {
        $matching_group = pm_get_matching_group();
        $slug = preg_replace("/(coque-iphone-{$matching_group})/", '', $slug);
    }

    return $slug;
}
add_filter('permalink_manager_filter_default_post_slug', 'pm_filter_product_slugs', 9, 2);