允许参与者上传图片

if ( current_user_can('contributor') && !current_user_can('upload_files') )
     add_action('admin_init', 'allow_contributor_uploads');      
     function allow_contributor_uploads() {
          $contributor = get_role('contributor');
          $contributor->add_cap('upload_files');
     }

非插件实现受欢迎的文章

function count_post_visits() {
    if( is_single() ) {
        global $post;
        $views = get_post_meta( $post->ID, 'my_post_viewed', true );
        if( $views == '' ) {
            update_post_meta( $post->ID, 'my_post_viewed', '1' );   
        } else {
            $views_no = intval( $views );
            update_post_meta( $post->ID, 'my_post_viewed', ++$views_no );
        }
    }
}
add_action( 'wp_head', 'count_post_visits' );

在文章模板中使用一下代码获取受欢迎的文章

$popular_posts_args = array(
    'posts_per_page' => 3,
    'meta_key' => 'my_post_viewed',
    'orderby' => 'meta_value_num',
    'order'=> 'DESC'
);
$popular_posts_loop = new WP_Query( $popular_posts_args );
  while( $popular_posts_loop->have_posts() ):
    $popular_posts_loop->the_post();
    // Loop continues
endwhile;
wp_reset_query();

在WordPress中禁用搜索

function fb_filter_query( $query, $error = true ) {
if ( is_search() ) {
$query->is_search = false;
$query->query_vars[s] = false;
$query->query[s] = false;
// to error
if ( $error == true )
$query->is_404 = true;
}
}
add_action( 'parse_query', 'fb_filter_query' );
add_filter( 'get_search_form', create_function( '$a', "return null;" ) );

保护您的网站不受恶意请求

global $user_ID; if($user_ID) {
    if(!current_user_can('administrator')) {
        if (strlen($_SERVER['REQUEST_URI']) > 255 ||
            stripos($_SERVER['REQUEST_URI'], "eval(") ||
            stripos($_SERVER['REQUEST_URI'], "CONCAT") ||
            stripos($_SERVER['REQUEST_URI'], "UNION+SELECT") ||
            stripos($_SERVER['REQUEST_URI'], "base64")) {
                @header("HTTP/1.1 414 Request-URI Too Long");
                @header("Status: 414 Request-URI Too Long");
                @header("Connection: Close");
                @exit;
        }
    }
}

禁用顶栏

// Remove the admin bar from the front end
add_filter( 'show_admin_bar', '__return_false' );

在RSS中显示文章缩略图

// Put post thumbnails into rss feed
function wpfme_feed_post_thumbnail($content) {
global $post;
if(has_post_thumbnail($post->ID)) {
$content = '' . $content;
}
return $content;
}
add_filter('the_excerpt_rss', 'wpfme_feed_post_thumbnail');
add_filter('the_content_feed', 'wpfme_feed_post_thumbnail');