General wordpress link filter

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everyone! I need to add the domain prefix www, not to write by hand, each filter as post_link, page_link, category_link and so on – there is a global filter to all urls added www. Methods of how to change the general settings in the site url in the database or change options or htaccess – just do not fit. Thanks in advance for your reply.

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  1. If you can’t change it via the wp-admin, you can use the following:

            add_filter( 'post_link', array($this, 'changePermalinks'), 10, 3);
        add_filter( 'page_link', array($this, 'changePermalinks'), 10, 3);
        add_filter( 'post_type_link', array($this, 'changePermalinks'), 10, 3);
        add_filter( 'category_link', array($this, 'changePermalinks'), 11, 3);
        add_filter( 'tag_link', array($this, 'changePermalinks'), 10, 3);
        add_filter( 'author_link', array($this, 'changePermalinks'), 11, 3);
        add_filter( 'day_link', array($this, 'changePermalinks'), 11, 3);
        add_filter( 'month_link', array($this, 'changePermalinks'), 11, 3);
        add_filter( 'year_link', array($this, 'changePermalinks'), 11, 3);

        function changePermalinks($permalink, $post) {

                if ( strpos($permalink, '://www.') ) return $permalink;

                return str_replace('://', '://www.', $permalink);
        }

  2. In your dashboard go to Settings -> General and the fourth and fifth option should be “WordPress Address (URL)” and “Site Address (URL)”. Change the http://example.com to http://www.example.com and it should change all links.