Shadow Indicator

indicate-shadow.php

<?php
/**
 * Plugin name: Shadow Indicator
 * Author: Antti Kuosmanen / Seravo Oy
 * Version: 1.0
 * 
 * Show the user which environment we're in at all times
 */
add_action('wp_head', '_indicate_environment');
add_action('admin_notices', '_indicate_environment');
function _indicate_environment() {
  if( getenv('WP_ENV') && getenv('WP_ENV') != 'production') {
    ?>
    <div class="notice updated">
      <p><strong>Current environment is <?php echo getenv('WP_ENV'); ?></strong>. Please note that you will not see any message while in production so please make sure to always double check your environment!
    </div>
    <?php
  }
}