Preventing index.php?category_name=something from redirecting

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I’m trying to filter posts in a category by the year of the post’s date. I also want to do this without being redirected to the year template so my ideal URL would be http://example.com/category/reports/2011/ which would load the template file category.php where I could then use query_posts to include only the posts that were published in 2011 and are in the reports category.

Here is my rewrite rule code… 

function filter_category_by_year_rewrite_rules( $wp_rewrite ) {
    /* Creates rewrite rules for filtering category archives by year (/category/reports/2011/)*/
    $new_rules = array(
        "category/(.+?)/(\d\d\d\d)/?$" => "index.php?category_name=" . $wp_rewrite->preg_index(1) . "&year=" . $wp_rewrite->preg_index(2)
    );
    $wp_rewrite->rules = $new_rules + $wp_rewrite->rules;
    var_dump($wp_rewrite);
}
add_action('generate_rewrite_rules', 'filter_category_by_year_rewrite_rules');

My problem is WordPress automatically redirects index.php?category_name=reports&year=2011 to /category/reports/ with no trace of the year parameter. How can I intercept this redirect?

I tried hooking in to the template_redirect action to no avail 🙁

function testing_redirect() {
    global $wp;
    if($wp->request['matched_rule'] == 'category/(.+?)/(\d\d\d\d)/?$') {
        load_template( 'category.php' ); //TEMPLATEPATH .'/category.php';
    }
}
add_action('template_redirect', 'testing_redirect', 1);

2 Answers
2

This should work:

add_action( 'init', 'wpa12742_init' );

function wpa12742_init(){
  add_rewrite_rule( 'category/(.+?)/(\d{4})/?$', 'index.php?category_name=$matches[1]&year=$matches[2]', 'top' );
  add_rewrite_rule( 'category/(.+?)/(\d{4})/page/(\d+)/?$', 'index.php?category_name=$matches[1]&year=$matches[2]&paged=$matches[3]', 'top' );
}

EDIT

On second thought, that’s not enough, since you’ll get caught by redirect_canonical().

Add this too:

add_filter( 'term_link', 'wpa12743_term_link', 10, 3 );

function wpa12743_term_link( $link, $term, $taxonomy ){
  if('category' != $taxonomy && !preg_match( '@^\d{4}$@', get_query_var('year') ) )
    return $link;
  return trailingslashit( $link ) . get_query_var( 'year' );
}

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