Remove the WordPress Logo from the Toolbar 删除左上角logo（关于）

add_action( 'admin_bar_menu', 'remove_wp_logo', 999 );

function remove_wp_logo( $wp_admin_bar ) {
    $wp_admin_bar->remove_node( 'wp-logo' );
}

正上方 admin-bar 部分

<?php $wp_admin_bar->remove_node( $id ); ?>

或者（二者等价）

<?php $wp_admin_bar->remove_menu( $id ); ?>

via remove node

Remove WordPress Dashboard Welcome Panel 删除欢迎

//Remove  WordPress Welcome Panel
remove_action('welcome_panel', 'wp_welcome_panel');

修改版权（左下方）

// customize admin footer text
function custom_admin_footer() {
    echo '2014 &copy by guoshuang';
} 
add_filter('admin_footer_text', 'custom_admin_footer');

删除左侧菜单项目

有时候，外观（主题）、插件之类不想让用户修改，要去掉。

//删除菜单项目
function remove_menus(){
  remove_menu_page( 'index.php' );                  //Dashboard
  // remove_menu_page( 'edit.php' );                   //Posts
  // remove_menu_page( 'upload.php' );                 //Media
  // remove_menu_page( 'edit.php?post_type=page' );    //Pages
  remove_menu_page( 'edit-comments.php' );          //Comments
  // remove_menu_page( 'themes.php' );                 //Appearance
  // remove_menu_page( 'plugins.php' );                //Plugins
  // remove_menu_page( 'users.php' );                  //Users
  // remove_menu_page( 'tools.php' );                  //Tools
  // remove_menu_page( 'options-general.php' );        //Settings
}
add_action( 'admin_menu', 'remove_menus' );

admin 后台主题

用户可能接受不了黑色，在 /wp-admin/about.php 这里可以切换颜色

dashboard 控制

//dashboard 部分控制
function example_remove_dashboard_widgets() {
    global $wp_meta_boxes;
     unset($wp_meta_boxes['dashboard']['side']['core']['dashboard_quick_press']);
    unset($wp_meta_boxes['dashboard']['normal']['core']['dashboard_incoming_links']);
    // unset($wp_meta_boxes['dashboard']['normal']['core']['dashboard_right_now']);
    unset($wp_meta_boxes['dashboard']['normal']['core']['dashboard_plugins']);
    unset($wp_meta_boxes['dashboard']['normal']['core']['dashboard_recent_drafts']);
    unset($wp_meta_boxes['dashboard']['normal']['core']['dashboard_recent_comments']);
    unset($wp_meta_boxes['dashboard']['side']['core']['dashboard_primary']);//这是wp新闻
    unset($wp_meta_boxes['dashboard']['side']['core']['dashboard_secondary']);

} 
add_action('wp_dashboard_setup', 'example_remove_dashboard_widgets' );

还可以判断用户，然后给出不同的 后台！