Владимир Брумер

add_action('current_screen','remove_editor_support');
if(!function_exists('remove_editor_support')){
function remove_editor_support(){
    $get_screen=get_current_screen();
    $current_screen=$get_screen->post_type;
    $post_type='post';
    // $post_type='page';
    if($current_screen==$post_type){
        remove_post_type_support($current_screen,'editor');
    }
}}

global $post;
if(!is_home()&&!is_404()&&!is_search()&&isset($post->ID)){$VAB_SEOA=get_post_meta($post->ID,'VAB_SEO',true);}

$SEO_title=isset($VAB_SEOA['SEO_title'])?$VAB_SEOA['SEO_title']:(get_the_title()&&!is_home()&&!is_front_page()&&!is_archive()&&!is_search()?get_the_title()/*.' | '.get_bloginfo('name')*/:(is_home()||is_front_page()?get_bloginfo('name').' | '.get_bloginfo('description'):(is_404()?'404 - '.esc_html__('страница не существует','VAB'):(is_search()?esc_html__('Результаты поиска','VAB').': '.get_search_query():(is_archive()?(is_day()?esc_html__('Архив по дням','VAB').': '.get_the_date():(is_month()?esc_html__('Архив по месяцам','VAB').': '.get_the_date('F Y'):(is_year()?esc_html__('Архив по годам','VAB').': '.get_the_date('Y'):(is_category()?esc_html__('Категория архива','VAB').': '.single_cat_title('',false):(is_tag()?esc_html__('Архив по меткам','VAB').': '.single_tag_title('',false):(has_post_format()?esc_html__('Архив по формату','VAB').': '.single_tag_title('',false).'/'.get_post_format():(is_author()?esc_html__('Архив Автора','VAB').': '.get_the_author_meta('display_name',get_user_by('id',get_query_var('author'))->ID):esc_html__('Архив блога','VAB')))))))):get_bloginfo('name').' | '.get_bloginfo('description'))))));

<?php
if(!defined('ABSPATH')){exit;}
class Skyrocket_TinyMCE_Custom_control extends WP_Customize_Control{
	/**
	 * The type of control being rendered
	 */
	public $type = 'tinymce_editor';
	/**
	 * Enqueue our scripts and styles
	 */
	public function enqueue(){
		wp_enqueue_script( 'skyrocket-custom-controls-js', get_template_directory_uri() . '/js/customizer.js', array( 'jquery' ), '1.0', true );
		wp_enqueue_style( 'skyrocket-custom-controls-css', get_template_directory_uri() . '/css/customizer.css', array(), '1.0', 'all' );
		wp_enqueue_editor();
	}
	/**
	 * Pass our TinyMCE toolbar string to JavaScript
	 */
	public function to_json() {
		parent::to_json();
		$this->json['skyrockettinymcetoolbar1'] = isset( $this->input_attrs['toolbar1'] ) ? esc_attr( $this->input_attrs['toolbar1'] ) : 'bold italic bullist numlist alignleft aligncenter alignright link';
		$this->json['skyrockettinymcetoolbar2'] = isset( $this->input_attrs['toolbar2'] ) ? esc_attr( $this->input_attrs['toolbar2'] ) : '';
		$this->json['skyrocketmediabuttons'] = isset( $this->input_attrs['mediaButtons'] ) && ( $this->input_attrs['mediaButtons'] === true ) ? true : false;
	}
	/**
	 * Render the control in the customizer
	 */
	public function render_content(){
	?>
		<div class="tinymce-control">
			<span class="customize-control-title"><?php echo esc_html( $this->label ); ?></span>
			<?php if( !empty( $this->description ) ) { ?>
				<span class="customize-control-description"><?php echo esc_html( $this->description ); ?></span>
			<?php } ?>
			<textarea id="<?php echo esc_attr( $this->id ); ?>" class="customize-control-tinymce-editor" <?php $this->link(); ?>><?php echo esc_attr( $this->value() ); ?></textarea>
		</div>
	<?php
	}
}

/* ==========================================================================
   Textarea/TinyMCE
   ========================================================================== */
.tinymce-control textarea {
	width: 100%;
	padding: 10px;
}

jQuery( document ).ready(function($) {
	"use strict";
	/**
	 * TinyMCE Custom Control
	 *
	 * @author Anthony Hortin <http://maddisondesigns.com>
	 * @license http://www.gnu.org/licenses/gpl-2.0.html
	 * @link https://github.com/maddisondesigns
	 */

	$('.customize-control-tinymce-editor').each(function(){
		// Get the toolbar strings that were passed from the PHP Class
		var tinyMCEToolbar1String = _wpCustomizeSettings.controls[$(this).attr('id')].skyrockettinymcetoolbar1;
		var tinyMCEToolbar2String = _wpCustomizeSettings.controls[$(this).attr('id')].skyrockettinymcetoolbar2;
		var tinyMCEMediaButtons = _wpCustomizeSettings.controls[$(this).attr('id')].skyrocketmediabuttons;

		wp.editor.initialize( $(this).attr('id'), {
			tinymce: {
				wpautop: true,
				toolbar1: tinyMCEToolbar1String,
				toolbar2: tinyMCEToolbar2String
			},
			quicktags: true,
			mediaButtons: tinyMCEMediaButtons
		});
	});
	$(document).on( 'tinymce-editor-init', function( event, editor ) {
		editor.on('change', function(e) {
			tinyMCE.triggerSave();
			$('#'+editor.id).trigger('change');
		});
	});
});

...
$customizer->add_setting( 'sample_tinymce_editor',
   array(
      'default' => '',
      // 'transport' => 'postMessage',
      'sanitize_callback' => 'wp_kses_post'
   )
);
$customizer->add_control( new Skyrocket_TinyMCE_Custom_control( $customizer, 'sample_tinymce_editor',
   array(
      'label' => __( 'TinyMCE Control' ),
      'description' => __( 'This is a TinyMCE Editor Custom Control' ),
      'section' => 'section_VAB_Agree',
      'input_attrs' => array(
         'toolbar1' => 'bold italic bullist numlist alignleft aligncenter alignright link',
         'mediaButtons' => true,
      )
   )
));
...

// 1
add_action('check_admin_referer',function($action){
	$blog_count=get_blog_count();
	if(is_network_admin()&&isset($_REQUEST['action'])&&'add-site'===$_REQUEST['action']&&$blog_count==2){
		wp_die(__('Достигнут лимит','VAB'));
	}});

// 2
$blog_count=get_blog_count();
if(is_network_admin()&&isset($_REQUEST['action'])&&'add-site'===$_REQUEST['action']&&$blog_count==2){
    add_action('check_admin_referer',function($action){
        // if('add-blog'!==$action){return;}
        wp_die(__('Достигнут лимит','VAB'));
    });}

// ... другие аналоги

require_once ABSPATH . 'wp-admin/admin-footer.php';

add_action('network_site_new_form','action_function_name_6729');
function action_function_name_6729(){
	$blog_count=get_blog_count();
	if($blog_count==2){exit();}
}

add_action("admin_print_scripts-site-new.php",'my_admin_scripts');
function my_admin_scripts(){
  $blog_count=get_blog_count();
  if($blog_count==2){
		exit('<center><strong style="font-size:33px;">'.__('Достигнут лимит создания поддоменов','VAB').'</strong></center>');}}