我目前有以下代码，在user\\u business表中有一个名为“Clark Farm”的用户。下面的代码不返回任何内容。如果删除搜索词，则会列出所有用户。我正在试图确定为什么搜索不起作用。。

<?php
/**
 * @package WordPress
 * @subpackage themename
 */

get_header(); ?>
<?php 
    $url = $_SERVER[\'REQUEST_URI\'];
    $tokens = explode(\'/\', $url);
    $search = $tokens[sizeof($tokens)-1];
    $searchQuery = str_replace("-", " ", $search);
?>
<?php echo $search; ?>
<div id="main">
        <div id="primary">
            <div id="content">
                <?php the_post(); ?>
                <div class="contentLeft">

                <article id="post-<?php the_ID(); ?>" <?php post_class(); ?> role="article">

                        <h1 class="entry-title">Search Results for: <?php echo $searchQuery; ?></h1>

                    <div class="entry-content">

                        <?php 
                            // WP_User_Query arguments
                            $args = array (
                                \'search\'         => \'Clark\',
                                \'search_columns\' => array( \'user_business\' ),
                                \'count_total\'    => true,
                                \'fields\'         => \'all_with_meta\',
                            );

                            // The User Query
                            $user_query = new WP_User_Query( $args );

                            // The User Loop
                            if ( ! empty( $user_query->results ) ) {
                                foreach ( $user_query->results as $user ) {
                                    echo $user->user_business . \'<br>\';
                                }
                            } else {
                                    echo \'NOT WORKING!\';
                            }
                        ?>

                    </div><!-- .entry-content -->
                </article><!-- #post-<?php the_ID(); ?> -->

                </div>
                <div class="contentRight"><?php if ( dynamic_sidebar(\'main-sidebar\') ) : else : ?><?php endif; ?></div>
                </div>
            </div><!-- #content -->
        </div><!-- #primary -->
<?php get_footer(); ?>