[Hummingbird] Replaces AO Base URL

wpmudev-hb-replace-ao-base-url.php

<?php
/**
 * Plugin Name: [Hummingbird] Replaces AO Base URL
 * Plugin URI: https://wpmudev.com/
 * Description: Useful when the site is setup on one address, but runs for users on a different URL.
 * Author: Glauber Silva @ WPMUDEV
 * Author URI: https://wpmudev.com/
 * Task: SLS-1799
 * License: GPLv2 or later
 *
 * @package WPMUDEV_Hummingbird_Replace_AO_Base_URL
 */

defined( 'ABSPATH' ) || exit;


if ( ! class_exists( 'WPMUDEV_Hummingbird_Replace_AO_Base_URL' ) && ! is_admin() ) {


	/**
	 * Main class of the plugin.
	 */
	class WPMUDEV_Hummingbird_Replace_AO_Base_URL {
		
		/**
		 * Insert below the old and the new address (base URL) without the protocol (HTTP or HTTPS)
		 */
		private $old_base_url = '//your-OLD-address-without-protocol-goes-here.com/';
		private $new_base_url = '//your-NEW-address-without-protocol-goes-here.com/';
		
		private static $instance = null;
		
		public static function get_instance() {

			if ( is_null( self::$instance ) ) {
				self::$instance = new WPMUDEV_Hummingbird_Replace_AO_Base_URL();
			}

			return self::$instance;
		}
		
		private function __construct() {

			$this->init();
		}
		
		public function init() {						

			add_filter( 'style_loader_tag', array( $this, 'style_handler' ), PHP_INT_MAX );
			add_filter( 'script_loader_tag', array( $this, 'script_handler' ), PHP_INT_MAX );							
		}	
		
		public function style_handler( $html ) {			

			$html = str_replace( $this->old_base_url, $this->new_base_url, $html );

			return $html;
		}
		
		public function script_handler( $tag ) {			
	
			$tag = str_replace( $this->old_base_url, $this->new_base_url, $tag );		

			return $tag;
		}
		
	}
	
	add_action(
		'plugins_loaded',
		function() {
			return WPMUDEV_Hummingbird_Replace_AO_Base_URL::get_instance();
		}
	);
}