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class-lean-wp.php
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class-lean-wp.php
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<?php
if ( ! defined( 'ABSPATH' ) ) exit;
class LEAN_WP {
/**
* The single instance of LEAN_WP.
* @var object
* @access private
* @since 1.0.0
*/
private static $_instance = null;
/**
* The version number.
* @var string
* @access public
* @since 1.0.0
*/
public $version;
/**
* The main plugin file.
* @var string
* @access public
* @since 1.0.0
*/
public $file;
/**
* The main plugin directory.
* @var string
* @access public
* @since 1.0.0
*/
public $dir;
/**
* The plugin assets URL.
* @var string
* @access public
* @since 1.0.0
*/
public $assets_url;
/**
* Constructor function.
* @access public
* @since 1.0.0
* @return void
*/
public function __construct ( $file = '', $version = '1.4.0' ) {
$this->_version = $version;
$this->_token = 'lean_wp';
// Load plugin environment variables
$this->file = $file;
$this->dir = dirname( $this->file );
$this->assets_url = esc_url( trailingslashit( plugins_url( '/assets/', $this->file ) ) );
$this->script_suffix = defined( 'SCRIPT_DEBUG' ) && SCRIPT_DEBUG ? '' : '.min';
register_activation_hook( $this->file, array( $this, 'install' ) );
// Load admin CSS
add_action( 'admin_enqueue_scripts', array( $this, 'admin_enqueue_styles' ), 10, 1 );
// Handle localisation
add_action( 'plugins_loaded', array( $this, 'i18n' ), 0 );
/*** PLUGIN FUNCTIONS ***/
/***
*** ACTIONS AND FILTERS RELATED TO BACKEND
***/
// removes redundant items from adminbar
add_action( 'admin_bar_menu', array( $this, 'remove_redundant_items_adminbar' ), 99 );
// removes howdy "greeting"
add_filter( 'admin_bar_menu', array( $this, 'remove_howdy' ) );
// remove welcome panel
remove_action( 'welcome_panel', 'wp_welcome_panel' );
// removes dashboard widgets and removes certain admin sidebar (sub)menus
add_action( 'admin_menu', array( $this, 'edit_admin' ), 9999 );
// removes a number of default widgets
add_action( 'widgets_init', array( $this, 'remove_wp_default_widgets' ) );
// Disable XML-RPC - //plugins.svn.wordpress.org/disable-xml-rpc/tags/1.0.1/disable-xml-rpc.php
add_filter( 'xmlrpc_enabled', '__return_false' );
// Remove call for XML-RPC from HEAD - @ZenPress //wordpress.stackexchange.com/questions/219643/best-way-to-eliminate-xmlrpc-php#comment350490_219666
add_filter( 'pings_open', '__return_false', PHP_INT_MAX );
// Disable scrollfree editor
add_action( 'after_setup_theme', array( $this, 'scrollfree_editor_off' ) );
// Reorder Pages, Posts and Media
add_action( 'admin_menu', array( $this, 'reorder_pages_posts_media' ) );
// Prevents plugins from injecting themselves as top level menus (example: Jetpack)
add_filter( 'custom_menu_order', '__return_true' );
add_filter( 'menu_order', array( $this, 'menu_order' ), 99 );
// Move Gravity Forms menu down if plugin is active
add_filter( 'gform_menu_position', array( $this, 'gform_under_settings' ) );
// Set Reading Settings "Front page displays" to Page
// @since 1.2.0 make function pluggable so it can be overridden
if ( ! function_exists( 'show_page_on_front' ) ) {
add_filter( 'pre_option_show_on_front', array( $this, 'show_page_on_front' ) );
}
// Disable file editors
if ( ! defined( 'DISALLOW_FILE_EDIT' ) )
define( 'DISALLOW_FILE_EDIT', true );
// Set different defaults for certain options
add_action( 'init', array( $this, 'update_options' ) );
// Remove contextual help //and screen options
add_filter( 'contextual_help', array( $this, 'remove_contextual_help' ), 999, 3 );
// Remove admin footer text and WP version
add_filter( 'admin_footer_text', '__return_empty_string', 11 );
add_filter( 'update_footer', '__return_empty_string', 11 );
/***
*** ACTIONS AND FILTERS RELATED TO FRONTEND
***/
add_action( 'init', array( $this, 'clean_head' ) );
// remove WP version from RSS, styles and scripts
add_filter( 'the_generator', array( $this, 'remove_wp_version_from_rss' ) );
// remove WP version from enqueued styles and scripts
add_filter( 'style_loader_src', array( $this, 'remove_wp_version_styles_scripts' ) );
add_filter( 'script_loader_src', array( $this, 'remove_wp_version_styles_scripts' ) );
// remove all meta generators
add_action( 'get_header', array( $this, 'clean_meta_generators' ), 100 );
add_action( 'wp_footer', function() { ob_end_flush(); }, 100 );
// set default display name new user registrations to first_name last_name
add_action( 'user_register', array( $this, 'set_default_display_name' ) );
// changing the author URL
// handle incoming links with the author first_name instead of the author slug
// generate author post urls with the sitename instead of the standard username-slug
add_filter( 'request', array ( $this, 'author_firstname_request' ) );
add_filter( 'author_link', array ( $this, 'sitename_author_link' ), 10, 3 );
// disable author archives
remove_filter( 'template_redirect', 'redirect_canonical' );
add_action( 'template_redirect', array( $this, 'disable_author_archives' ) );
// block user-enumeration
if ( ! is_admin() ) {
// default URL format
if (preg_match( '/author=([0-9]*)/i', $_SERVER[ 'QUERY_STRING' ] ) ) die();
add_filter( 'redirect_canonical', array( $this, 'check_enum' ), 10, 2 );
}
// change default category name
// @modified 1.0.1 - add check if Uncategorized term_exists
$term = term_exists( 'Uncategorized', 'category' );
if ( $term !== 0 && $term !== null ) {
wp_update_term(
1, 'category', array(
'name' => __( 'General', 'lean-wp' ),
'slug' => 'general',
'description' => __( 'The default Category for the Posts post type', 'lean-wp' )
)
);
}
} // End __construct ()
/**
* Wrapper function to register a new dashboard widget
* @param string $widget_id Taxonomy name
* @param string $widget_name Taxonomy single name
* @param string $callback control_callbackpost_types Post types to which this taxonomy applies
* @return object Dashboard Widget class object
*/
public function init() {
//Register the widget...
wp_add_dashboard_widget( 'leanwp-dashboard-widget', esc_html__( 'Site information', 'lean-wp'), array( 'LEAN_WP_Dashboard_Widget', 'widget' ) );
}
/**
* Load admin CSS.
* @access public
* @since 1.0.0
* @return void
*/
public function admin_enqueue_styles ( $hook = '' ) {
wp_register_style( $this->_token . '-admin', esc_url( $this->assets_url ) . 'css/admin.css', array(), $this->_version );
wp_enqueue_style( $this->_token . '-admin' );
} // End admin_enqueue_styles ()
/**
* Loads the translation file.
* @access public
* @since 1.0.0
* @return void
*/
public function i18n() {
load_plugin_textdomain( 'lean-wp', false, false );
} // End i18n ()
/**
* Remove items from adminbar.
*
* @since 1.0.0
*/
public function remove_redundant_items_adminbar( $wp_admin_bar ) {
global $wp_admin_bar;
/*** BACKEND ***/
// remove WP logo and subsequent drop-down menu
$wp_admin_bar->remove_node( 'wp-logo' );
// remove View Site text
$wp_admin_bar->remove_node( 'view-site' );
// remove "+ New" drop-down menu
$wp_admin_bar->remove_node( 'new-content' );
// remove Comments
$wp_admin_bar->remove_node( 'comments' );
// remove plugin updates count
$wp_admin_bar->remove_node( 'updates' );
/*** FRONTEND ***/
// remove Dashboard link
$wp_admin_bar->remove_node( 'dashboard' );
// remove Themes, Widgets, Menus, Header links
$wp_admin_bar->remove_node( 'appearance' );
}
/**
* Remove Howdy.
*
* @since 1.0.0
* @modified 1.1.0
*/
public function remove_howdy( $wp_admin_bar ) {
$my_account = $wp_admin_bar->get_node( 'my-account' );
$newtitle = '';
$wp_admin_bar->add_node(
array(
'id' => 'my-account',
'title' => $newtitle,
)
);
}
/**
* Edit the backend.
*
* dashboard widgets
* sidebar menu items
* sidebar sub menu items
*
* @since 1.0.0
*/
public function edit_admin() {
// remove all WordPress default dashboard widgets
remove_meta_box( 'dashboard_activity', 'dashboard', 'core' );
remove_meta_box( 'dashboard_right_now', 'dashboard', 'core' );
remove_meta_box( 'dashboard_recent_comments', 'dashboard', 'core' );
remove_meta_box( 'dashboard_incoming_links', 'dashboard', 'core' );
remove_meta_box( 'dashboard_plugins', 'dashboard', 'core' );
remove_meta_box( 'dashboard_quick_press', 'dashboard', 'core' );
remove_meta_box( 'dashboard_recent_drafts', 'dashboard', 'core' );
remove_meta_box( 'dashboard_primary', 'dashboard', 'core' );
remove_meta_box( 'dashboard_secondary', 'dashboard', 'core' );
// remove Tools menu
// due to all whining removed on May 9, 2019
//remove_menu_page( 'tools.php' );
// remove "Header" and "Custom Background" sub-menus from "Appearance"
remove_submenu_page( 'themes.php', 'custom-header' );
remove_submenu_page( 'themes.php', 'custom-background' );
// remove Edit CSS sub-menu from "Appearance" (since WP 4.8)
remove_submenu_page( 'themes.php', 'editcss-customizer-redirect' );
if ( is_plugin_active( 'jetpack/jetpack.php' ) ) {
add_submenu_page( 'jetpack', __( 'Lean Settings', 'lean-wp' ), __( 'Lean Settings', 'lean-wp' ), 'manage_options', 'admin.php?page=jetpack_modules' );
}
}
/**
* Remove default widgets.
*
* @since 1.0.0
*/
public function remove_wp_default_widgets() {
unregister_widget( 'WP_Widget_Pages' );
unregister_widget( 'WP_Widget_Calendar' );
unregister_widget( 'WP_Widget_Archives' );
if ( get_option( 'link_manager_enabled' ) )
unregister_widget( 'WP_Widget_Links' );
unregister_widget( 'WP_Widget_Meta' );
unregister_widget( 'WP_Widget_Categories' );
unregister_widget( 'WP_Widget_Recent_Comments' );
unregister_widget( 'WP_Widget_RSS' );
unregister_widget( 'WP_Widget_Tag_Cloud' );
}
/**
* Disable scroll-free editor.
*
* @since 1.0.0
*/
public function scrollfree_editor_off() {
set_user_setting( 'editor_expand', 'off' );
}
/**
* Reorder Pages, Posts and Media admin menus
*
* - Pages gets position 5
* - Posts gets position 50
* - Media gets position 58 (before separator of Appearance)
*
* This means that there is ample space to position Custom Post Types
*
* @source: //randyhoyt.com/wordpress/admin/
* @source: //cdn.tutsplus.com/wp/uploads/legacy/228_Customizing_Your_WordPress_Admin/chart.gif
*
* @since 1.0.0
*/
function reorder_pages_posts_media() {
/**
* plugins that disable blogging do something similar which might be conflicting
* therefore so only execute this function when those plugins are not installed
*
* plugins we know and which we have tested for, are:
* - [Disable Blogging](https://wordpress.org/plugins/disable-blogging/) by Fact Maven
* - [Disable Blog](https://wordpress.org/plugins/disable-blog/) by Joshua Nelson
*
*/
if ( ! is_plugin_active( 'disable-blogging/disable-blogging.php' ) && ! is_plugin_active( 'disable-blog/disable-blog.php' ) ) {
global $menu;
$menu[50] = $menu[5]; // Posts goes from position 5 to position 50
$menu[58] = $menu[10]; // Media goes from position 10 to position 58 (right above Appearance-separator)
$menu[5] = $menu[20]; // Pages goes from position 20 to position 5 (originally Posts)
unset($menu[10]); //remove Media from original position
unset($menu[20]); //remove Pages from original position
}
}
/**
* Prevents plugins - for example Jetpack - from injecting themselves in the top part
* of the admin sidebar menu, right under "Dashboard"
*
* @source: based on Menu Humility plugin - //wordpress.org/plugins/menu-humility/
*
* @since 1.0.0
*/
public function menu_order( $menu ) {
if ( ! $menu ) return true;
$plugins_area = array();
foreach ( $menu as $key => $item ) {
if ( 'separator1' == $item ) {
break;
} elseif ( 'index.php' !== $item ) {
// remove it and put it in the plugins area instead
$plugins_area[] = $item;
unset( $menu[$key] );
}
}
// Move the items in the plugins area to the end of the menu
return array_merge( $menu, $plugins_area );
}
/**
* Move Gravity Forms admin menu under Settings
*
* @source: //gravityhelp.com/documentation/article/gform_menu_position/
*
* @since 1.0.0
*/
public function gform_under_settings( $position ) {
if ( is_plugin_active( 'gravityforms/gravityforms.php' ) ) {
return 80;
}
}
/**
* Change default reading setting "Front page displays"
*
* @source: //wordpress.stackexchange.com/q/259054/2015
*
* @since 1.0.0
*/
public function show_page_on_front() {
return 'page';
}
/**
* Set different defaults for certain options
*
* @since 1.0.0
*/
public function update_options() {
// Set reading option "For each article in a feed, show" to Summary
update_option( 'rss_use_excerpt', 1 );
// Turn off Gravatars (in Dashboard and for comments)
update_option( 'show_avatars', 0 );
// Uncheck boxes Settings > Discussion: Default article settings
update_option( 'default_pingback_flag', 0 );
update_option( 'default_ping_status', 0 );
}
/**
* Remove contextual help tabs
*
* @since 1.0.0
*/
public function remove_contextual_help( $old_help, $screen_id, $screen ) {
$screen->remove_help_tabs();
return $old_help;
}
/**
* WP_HEAD Cleanup.
*
* contains all cleaning related functions (frontend)
*
* @since 1.0.0
*/
public function clean_head() {
// EditURI link
remove_action( 'wp_head', 'rsd_link' );
// windows live writer
remove_action( 'wp_head', 'wlwmanifest_link' );
// links for adjacent posts
remove_action( 'wp_head', 'adjacent_posts_rel_link_wp_head', 10, 0 );
// wp shortlink
remove_action( 'wp_head', 'wp_shortlink_wp_head' );
} // end clean_head()
/**
* Remove WP version from RSS.
*
* @since 1.0.0
*/
public function remove_wp_version_from_rss() {
return '';
}
/**
* Remove WP version from enqueued styles and scripts.
*
* @since 1.0.0
*/
function remove_wp_version_styles_scripts( $src ) {
if ( strpos( $src, 'ver=' . get_bloginfo( 'version' ) ) )
$src = remove_query_arg( 'ver', $src );
return $src;
}
/**
* Remove all meta generators.
*
* @source: //stackoverflow.com/a/42380747/1381553
*
* @since 1.0.0
*/
public function remove_meta_generators( $html ) {
$pattern = '/<meta name(.*)=(.*)"generator"(.*)>/i';
$html = preg_replace( $pattern, '', $html );
return $html;
}
public function clean_meta_generators( $html ) {
ob_start( array( $this, 'remove_meta_generators' ) );
}
/**
* Set default display name New User Registrations to first_name last_name
* or to site name if first name is not filled in
*
* Best used on 'user_register'
* @param int $user_id The user ID
* @return void
* @uses get_userdata()
* @uses wp_update_user()
*
* @source: //stevegrunwell.com/blog/quick-tip-set-the-default-display-name-for-wordpress-users/
*/
public function set_default_display_name( $user_id ) {
$user = get_userdata( $user_id );
if ( ! empty ( $user->first_name ) ) {
// if first_name field is not empty set display name to first_name last_name
$name = sprintf( '%s %s', $user->first_name, $user->last_name );
} else {
// if first_name field is empty set display name to site name
$name = get_bloginfo( 'name' );
}
$args = array(
'ID' => $user_id,
'display_name' => $name,
'nickname' => $name
);
wp_update_user( $args );
}
/**
* Changing the author URL
*
* handle incoming links with the author first_name instead of the author slug
*
* @source: //wordpress.stackexchange.com/a/6527/2015 (adapted to use first_name instead of nickname)
*/
public function author_firstname_request( $query_vars ) {
if ( array_key_exists( 'author_name', $query_vars ) ) {
global $wpdb;
$author_id = $wpdb->get_var( $wpdb->prepare( "SELECT user_id FROM {$wpdb->usermeta} WHERE meta_key='first_name' AND meta_value = %s", $query_vars['author_name'] ) );
if ( $author_id ) {
$query_vars['author'] = $author_id;
unset( $query_vars['author_name'] );
}
}
return $query_vars;
}
/**
* Changing the author URL
*
* generate author post urls with the sitename instead of the standard username-slug
*
* @source: //wordpress.stackexchange.com/a/6527/2015 (adapted to use sitename instead of nickname)
*/
public function sitename_author_link( $link, $author_id, $author_nicename ) {
$link = str_replace( $author_nicename, get_bloginfo( 'name' ), $link );
return $link;
}
/**
* Disable author archives.
*
* @source: //wp-mix.com/wordpress-disable-author-archives/
*
* @since 1.0.0
*/
public function disable_author_archives() {
if ( is_author() ) {
global $wp_query;
$wp_query->set_404();
status_header( 404 );
} else {
redirect_canonical();
}
}
/**
* Block WP enum scans (user-enumeration).
*
* @source: //perishablepress.com/stop-user-enumeration-wordpress/
*
* @since 1.0.0
*/
public function check_enum( $redirect, $request ) {
// permalink URL format
if ( preg_match( '/\?author=([0-9]*)(\/*)/i', $request ) ) die();
else return $redirect;
}
/**
* Main LEAN_WP Instance
*
* Ensures only one instance of LEAN_WP is loaded or can be loaded.
*
* @since 1.0.0
* @static
* @see LEAN_WP()
* @return Main LEAN_WP instance
*/
public static function instance ( $file = '', $version = '1.4.0' ) {
if ( is_null( self::$_instance ) ) {
self::$_instance = new self( $file, $version );
}
return self::$_instance;
} // End instance ()
/**
* Cloning is forbidden.
*
* @since 1.0.0
*/
public function __clone () {
_doing_it_wrong( __FUNCTION__, __( 'Cheatin’ huh?' ), $this->_version );
} // End __clone ()
/**
* Unserializing instances of this class is forbidden.
*
* @since 1.0.0
*/
public function __wakeup () {
_doing_it_wrong( __FUNCTION__, __( 'Cheatin’ huh?' ), $this->_version );
} // End __wakeup ()
/**
* Installation. Runs on activation.
* @access public
* @since 1.0.0
* @return void
*/
public function install () {
$this->_log_version_number();
} // End install ()
/**
* Log the plugin version number.
* @access public
* @since 1.0.0
* @return void
*/
private function _log_version_number () {
update_option( $this->_token . '_version', $this->_version );
} // End _log_version_number ()
}