如果你有下面类似的需求，比如隐藏WordPress后台logo，或者隐藏wordpress后台外观菜单下面的编辑子菜单，或者直接隐藏wordpress后台整个插件菜单项，那么你可能会用到下面的代码：

function remove_menus() {

    global $menu;

    $restricted = array(

    __('Dashboard'),

    __('Posts'),

    __('Media'),

    __('Links'),

    __('Pages'),

    __('Appearance'),

    __('Tools'),

    __('Users'),

    __('Settings'),

    __('Comments'),

    __('Plugins')

    );

    end ($menu);

    while (prev($menu)){

    $value = explode(' ',$menu[key($menu)][0]);

    if(strpos($value[0], '<') === FALSE) {

    if(in_array($value[0] != NULL  $value[0]:"" , $restricted)){

    unset($menu[key($menu)]);

    }

    }else {

    $value2 = explode('<', $value[0]);

    if(in_array($value2[0] != NULL  $value2[0]:"" , $restricted)){

    unset($menu[key($menu)]);

    }

    }

    }

    }


    if (is_admin()){

    // 屏蔽左侧菜单

    add_action('admin_menu', 'remove_menus');

    }
function example_remove_dashboard_widgets() {

    // Globalize the metaboxes array, this holds all the widgets for wp-admin

    global $wp_meta_boxes;

     

    // 以下这一行代码将删除 "快速发布" 模块

    unset($wp_meta_boxes['dashboard']['side']['core']['dashboard_quick_press']);

     

    // 以下这一行代码将删除 "引入链接" 模块

    unset($wp_meta_boxes['dashboard']['normal']['core']['dashboard_incoming_links']);

     

    // 以下这一行代码将删除 "插件" 模块

    unset($wp_meta_boxes['dashboard']['normal']['core']['dashboard_plugins']);

     

    // 以下这一行代码将删除 "近期评论" 模块

    unset($wp_meta_boxes['dashboard']['normal']['core']['dashboard_recent_comments']);

     

    // 以下这一行代码将删除 "近期草稿" 模块

    unset($wp_meta_boxes['dashboard']['side']['core']['dashboard_recent_drafts']);

     

    // 以下这一行代码将删除 "WordPress 开发日志" 模块

    unset($wp_meta_boxes['dashboard']['side']['core']['dashboard_primary']);

     

    // 以下这一行代码将删除 "其它 WordPress 新闻" 模块

    unset($wp_meta_boxes['dashboard']['side']['core']['dashboard_secondary']);

     

    // 以下这一行代码将删除 "概况" 模块

    unset($wp_meta_boxes['dashboard']['normal']['core']['dashboard_right_now']);

    }

    add_action('wp_dashboard_setup', 'example_remove_dashboard_widgets' );


// 屏蔽后台左上LOGO

	function annointed_admin_bar_remove() {

    global $wp_admin_bar;

    /* Remove their stuff */

    $wp_admin_bar->remove_menu('wp-logo');

    }

    add_action('wp_before_admin_bar_render', 'annointed_admin_bar_remove', 0);

// 屏蔽后台页脚版本信息
 function change_footer_admin () {return '';}

    add_filter('admin_footer_text', 'change_footer_admin', 9999);

    function change_footer_version() {return '';}

    add_filter( 'update_footer', 'change_footer_version', 9999);


//屏蔽 WP 后台“显示选项”和“帮助”选项卡
 function remove_screen_options(){ return false;}

    add_filter('screen_options_show_screen', 'remove_screen_options');

    add_filter( 'contextual_help', 'wpse50723_remove_help', 999, 3 );

    function wpse50723_remove_help($old_help, $screen_id, $screen){

    $screen->remove_help_tabs();

    return $old_help;

    }
//屏蔽后台更新模块
 function wp_hide_nag() {

    remove_action( 'admin_notices', 'update_nag', 3 );

    }

    add_action('admin_menu','wp_hide_nag');
	    function remove_submenu() {

    // 删除”设置”下面的子菜单”隐私”

    remove_submenu_page('options-general.php', 'options-privacy.php');

    // 删除”外观”下面的子菜单”编辑”

    remove_submenu_page('themes.php', 'theme-editor.php');

    }     

    if (is_admin()){

    //删除子菜单

    add_action('admin_init','remove_submenu');

    }

上面的注释很清晰了，陌小雨不想多做解释，自己折腾吧。