This WordPress script allows specific users to toggle the visibility of selected admin menu items. It adds a toggle button to the admin bar, enabling easy switching between full and restricted admin views.

admin-elements-hiding-script.php

<?php
// Configuration - Users who can see everything and use the toggle
$GLOBALS['usernames_to_not_hide'] = array('superadmin'); 

// Multiusers
//$GLOBALS['usernames_to_not_hide'] = array('superuser1', 'superuser2'); 

// Update the pages_to_hide array
$GLOBALS['pages_to_hide'] = array(
    'index.php' => array('update-core.php'),
    'themes.php',
    'plugins.php',
    'tools.php',
    'edit.php',
    'users.php',
    'options-general.php',
    'automatic-css',
    'rank-math',
    'meta-box',
    'wp-mail-smtp',
    'mepr-toolbox',
    'bricks',
);

// Add toggle button to admin bar for specified users
add_action('admin_bar_menu', 'add_toggle_button', 999);
function add_toggle_button($admin_bar) {
    $usernames_to_not_hide = isset($GLOBALS['usernames_to_not_hide']) ? $GLOBALS['usernames_to_not_hide'] : array();
    $current_user = wp_get_current_user();
    
    if (!in_array($current_user->user_login, $usernames_to_not_hide)) {
        return; // Don't add the toggle for users not in the list
    }
    
    $is_active = get_option('hide_admin_elements_active', false);
    $button_text = $is_active ? 'Disable Admin Hide' : 'Enable Admin Hide';
    $button_class = $is_active ? 'hide-admin-active' : 'hide-admin-inactive';
    
    $admin_bar->add_menu(array(
        'id'    => 'hide-admin-toggle',
        'title' => '<span class="ab-icon"></span>' . $button_text,
        'href'  => '#',
        'meta'  => array(
            'class' => $button_class,
            'onclick' => 'return false;'
        ),
    ));
}

// Add JavaScript to handle toggle button click and page refresh
add_action('admin_footer', 'toggle_button_script');
function toggle_button_script() {
    $usernames_to_not_hide = isset($GLOBALS['usernames_to_not_hide']) ? $GLOBALS['usernames_to_not_hide'] : array();
    $current_user = wp_get_current_user();
    
    if (!in_array($current_user->user_login, $usernames_to_not_hide)) {
        return; // Don't add the script for users not in the list
    }
    
    ?>
    <script type="text/javascript">
    jQuery(document).ready(function($) {
        $('#wp-admin-bar-hide-admin-toggle').on('click', function(e) {
            e.preventDefault();
            const $button = $(this);
            const $buttonText = $button.find('.ab-item').contents().filter(function() {
                return this.nodeType === 3;
            });
            
            $.ajax({
                url: ajaxurl,
                type: 'POST',
                data: {
                    action: 'toggle_hide_admin_elements'
                },
                success: function(response) {
                    if(response.success) {
                        if(response.data.is_active) {
                            $button.addClass('hide-admin-active').removeClass('hide-admin-inactive');
                            $buttonText.replaceWith('Disable Admin Hide');
                        } else {
                            $button.addClass('hide-admin-inactive').removeClass('hide-admin-active');
                            $buttonText.replaceWith('Enable Admin Hide');
                        }
                        // Refresh the page after a short delay
                        setTimeout(function() {
                            location.reload();
                        }, 300);
                    }
                }
            });
        });
    });
    </script>
    <style>
    #wp-admin-bar-hide-admin-toggle .ab-icon:before {
        content: "\f160";
        top: 2px;
    }
    #wp-admin-bar-hide-admin-toggle.hide-admin-active .ab-icon:before {
        color: #dc3232;
    }
    #wp-admin-bar-hide-admin-toggle.hide-admin-inactive .ab-icon:before {
        color: #46b450;
    }
    </style>
    <?php
}

// AJAX handler for toggle button
add_action('wp_ajax_toggle_hide_admin_elements', 'toggle_hide_admin_elements');
function toggle_hide_admin_elements() {
    $usernames_to_not_hide = isset($GLOBALS['usernames_to_not_hide']) ? $GLOBALS['usernames_to_not_hide'] : array();
    $current_user = wp_get_current_user();
    
    if (!in_array($current_user->user_login, $usernames_to_not_hide)) {
        wp_send_json_error('Insufficient permissions');
    }
    
    $current_state = get_option('hide_admin_elements_active', false);
    $new_state = !$current_state;
    update_option('hide_admin_elements_active', $new_state);
    wp_send_json_success(['is_active' => $new_state]);
}

// Function to hide admin elements on page load
add_action('admin_menu', 'hide_admin_elements', 999);
function hide_admin_elements() {
    $usernames_to_not_hide = isset($GLOBALS['usernames_to_not_hide']) ? $GLOBALS['usernames_to_not_hide'] : array();
    $pages_to_hide = isset($GLOBALS['pages_to_hide']) ? $GLOBALS['pages_to_hide'] : array();
    $current_user = wp_get_current_user();
    $is_active = get_option('hide_admin_elements_active', false);
    
    if (!in_array($current_user->user_login, $usernames_to_not_hide) || $is_active) {
        foreach ($pages_to_hide as $page => $subpages) {
            if (is_string($subpages)) {
                remove_menu_page($subpages);
            } elseif (is_array($subpages)) {
                foreach ($subpages as $parent => $children) {
                    if (is_array($children)) {
                        foreach ($children as $child) {
                            remove_submenu_page($parent, $child);
                        }
                    }
                }
            }
        }
    }
}