PHP: Hide User Mu-Plugin

composer.json

{
    "name": "wpsmith/hide-user",
    "description": "Hides user in WordPress Admin.",
    "type": "project",
    "license": "GPLv2+",
    "authors": [
        {
            "name": "Travis Smith",
            "email": "t@wpsmith.net"
        }
    ],
    "minimum-stability": "dev",
    "require": {
        "wpsmith/user": "dev-master"
    }
}

hide-user-composer.php

<?php

/**
 * Plugin Name:     WPS User
 * Plugin URI:      https://wpsmith.net
 * Description:     User management.
 * Author:          Travis Smith <t@wpsmith.net>
 * Author URI:      https://wpsmith.net
 * Text Domain:     wps
 * Domain Path:     /languages
 * Version:         0.1.0
 */

/**
 * Plugin main file.
 *
 * @package WPS\Plugins\HideUser
 * @author  Travis Smith <t@wpsmith.net>
 * @license GPL-2.0+
 * @link    https://wpsmith.net/
 */

namespace WPS\Plugins\HideUser;

// Require the composer autoloader.
require 'vendor/autoload.php';

// Use the User Package & hide hidden_user1 & hidden_user2.
\WPS\User\HideUser::get_instance( array(
    'hidden_user1',
    'hidden_user2',
) );

hide-user-single-file.php

<?php

/**
 * Plugin Name:     WPS User
 * Plugin URI:      https://wpsmith.net
 * Description:     User management.
 * Author:          Travis Smith <t@wpsmith.net>
 * Author URI:      https://wpsmith.net
 * Text Domain:     wps
 * Domain Path:     /languages
 * Version:         0.1.0
 */

/**
 * Plugin main file.
 *
 * @package WPS\Plugins\HideUser
 * @author  Travis Smith <t@wpsmith.net>
 * @license GPL-2.0+
 * @link    https://wpsmith.net/
 */

namespace WPS\Plugins\HideUser;

add_action( 'pre_user_query', 'WPS\Plugins\HideUser\pre_user_query' );
/**
 * Remove user from all user queries.
 * @global \wpdb $wpdb WordPress database abstraction object.
 *
 * @param \WP_User_Query $user_search The current WP_User_Query instance,
 *                                    passed by reference.
 */
function pre_user_query( $user_search ) {
  
	/**
	 * @var \WP_User $current_user \WP_User object for the current user.
	 */
	$current_user = wp_get_current_user();
	if ( ! $current_user->exists() ) {
		return;
	}
  
	// If the current user is not hidden_user1, let's remove hidden_user1.
	if ( 'hidden_user1' !== $current_user->user_login ) {
		global $wpdb;
    
		// Now remove our hidden_user1 from the user query.
		$user_search->query_where = str_replace(
			'WHERE 1=1',
			"WHERE 1=1 AND {$wpdb->users}.user_login != 'hidden_user1'",
			$user_search->query_where
		);
	}
  
}

hide-user.php

<?php

/**
 * Plugin Name:     WPS User
 * Plugin URI:      https://wpsmith.net
 * Description:     User management.
 * Author:          Travis Smith <t@wpsmith.net>
 * Author URI:      https://wpsmith.net
 * Text Domain:     wps
 * Domain Path:     /languages
 * Version:         0.1.0
 */

/**
 * Plugin main file.
 *
 * @package WPS\Plugins\HideUser
 * @author  Travis Smith <t@wpsmith.net>
 * @license GPL-2.0+
 * @link    https://wpsmith.net/
 */

namespace WPS\Plugins\HideUser;