WordPress根据评论数量判断是否显示评论者链接

function fa_is_friend( $email = null , $num = 5 ){ //设置 num 来决定多少条评论之后可以显示地址
    $count = get_comments(array(
        'author_email' => $email,
        'count' => true,
    ));
    return ( $count > $num );
}

function fa_update_friend_list( $comment_id ){
    $comment = get_comment($comment_id);
    $friend_list = get_option('friend_list') ? get_option('friend_list') : array();
    $email = $comment->comment_author_email;
    if ( fa_is_friend($email) && !in_array( $email , $friend_list) ) { //判断评论者是不是在白名单里面
        $friend_list[] = $email;
        update_option('friend_list',$friend_list); //如果不在白名单中并且符合要求，那么将其添加至白名单
    }
}
add_action('comment_post', 'fa_update_friend_list');

function fa_show_friend_link( $return , $author, $comment_ID ){
    $comment = get_comment( $comment_ID );
    $email = $comment->comment_author_email;
    $friend_list = get_option('friend_list') ? get_option('friend_list') : array();
    if ( in_array($email,$friend_list) ) {
        return $return;
    } else {
        return $author;
    }
}
add_filter('get_comment_author_link','fa_show_friend_link',10,3);