我有一个分类搜索表单，链接输出是

http://localhost/wp/?cityid=16

但我想把它改写成

http://localhost/wp/cityid/16

。htaccess

# BEGIN WordPress
<IfModule mod_rewrite.c>
RewriteEngine On
RewriteBase /wp/
RewriteRule ^index\\.php$ - [L]
RewriteCond %{REQUEST_FILENAME} !-f
RewriteCond %{REQUEST_FILENAME} !-d
RewriteRule . /wp/index.php [L]
</IfModule>

# END WordPress

它不起作用：

RewirteRule ^wp/cityid/([0-9]+)$ ?cityid=$1 [L]

它也不起作用（来自wp codex）：

add_action(\'generate_rewrite_rules\', \'geotags_add_rewrite_rules\');

    function geotags_add_rewrite_rules( $wp_rewrite ) 
    {
      $new_rules = array( 
         \'cityid/(.+)\' => \'index.php?cityid=\' .
           $wp_rewrite->preg_index(1) );

      //​ Add the new rewrite rule into the top of the global rules array
      $wp_rewrite->rules = $new_rules + $wp_rewrite->rules;
    }

有什么帮助吗？

function geotags_add_rewrite_rules($wp_rewrite_rules) {
    global $wp_rewrite;

    $rule_key = \'%cityid%\';
    $url_pattern = \'([^/]+)\';
    $query_string = \'cityid=\';

    $wp_rewrite->add_rewrite_tag($rule_key, $url_pattern, $query_string);

    $url_structure = $wp_rewrite->root . "cityid/$rule_key/";
    $rewrite_rules = $wp_rewrite->generate_rewrite_rules($url_structure);

    $wp_rewrite_rules = $rewrite_rules + $wp_rewrite_rules;
    return $wp_rewrite_rules;
}

add_filter(\'rewrite_rules_array\', \'geotags_add_rewrite_rules\');

function geotags_add_query_var($query_vars) {
    array_push($query_vars, \'cityid\');
    return $query_vars;
}

add_filter(\'query_vars\',\'geotags_add_query_var\');