DomainAgnostic.php

<?php
/*
Plugin Name: Domain Agnostic
Plugin URI: http://URI_Of_Page_Describing_Plugin_and_Updates
Description: Allows quick copying of a DB to different domains.
Version: 1.0
Author: Stuart Barker
Author URI: http://www.caracaldigital.com
License:  GPL2
*/

class DomainAgnostic {
    static $_siteUrl = null;
    static function getDomain($siteUrl) {
        //takes the domain that comes from the DB ($siteUrl) and replaces the hostname with the real host.
        if(!self::$_siteUrl){
            if (isset($_SERVER['HTTP_X_FORWARDED_HOST']) && $host = $_SERVER['HTTP_X_FORWARDED_HOST']) {
                $elements = explode(',', $host);

                $host = trim(end($elements));
            } else {
                if (!$host = $_SERVER['HTTP_HOST']) {
                    if (!$host = $_SERVER['SERVER_NAME']) {
                        $host = !empty($_SERVER['SERVER_ADDR']) ? $_SERVER['SERVER_ADDR'] : '';
                    }
                }
            }

            // Remove port number from host
            $host = preg_replace('/:\d+$/', '', $host);

            $protocol = (!empty($_SERVER['HTTPS']) && $_SERVER['HTTPS'] !== 'off' || $_SERVER['SERVER_PORT'] == 443) ? "https" : "http";
            if($siteUrl){
                return trim($protocol . '://' . $host . parse_url($siteUrl, PHP_URL_PATH));

            }else{
                if(substr(SITECOOKIEPATH, -1)=='/'){
                    $siteRoot=rtrim(SITECOOKIEPATH, "/");
                }else{
                    $siteRoot=SITECOOKIEPATH;
                }
                self::$_siteUrl=trim($protocol . '://' . $host .$siteRoot);
            }
        }

        return self::$_siteUrl;


    }
    static function abs($url=false){
        return self::getDomain($url);
    }
    static function rel($url=false){
        $newUrl=self::getDomain($url);
        $newUrl =parse_url($newUrl, PHP_URL_PATH);
        if($newUrl=="") $newUrl="/";
        return $newUrl;
    }
    static function style_loader_src($url){
        $urlPath = parse_url($url, PHP_URL_PATH);
        return $urlPath;

        //remove base url
        $contentPath = parse_url(WP_CONTENT_URL, PHP_URL_PATH);
        if(substr_count($url,$contentPath)>1) {
            $x = true;
            $pos = strpos($url, $contentPath);
            if ($pos !== false) {
                return substr_replace($url, '', $pos, strlen($contentPath));
            }
        }
        return $url;

        //return preg_replace('/' .parse_url(WP_CONTENT_URL, PHP_URL_PATH) .'/','',$url,1);

    }
    static function wp_defaults( $args ) {
        $args->content_url=parse_url($args->content_url,PHP_URL_PATH);
        return $args;
    }
    static function checkOption($opt){
        global $wpdb;
        if($wpdb->get_var( "SELECT option_value FROM $wpdb->options WHERE option_name = '$opt'" )!==DomainAgnostic::abs()){

            $wpdb->update(
                $wpdb->options,
                array(
                    'option_value' => DomainAgnostic::abs()
                ),
                array( 'option_name' => $opt )
            );
        }
    }
}
add_action('wp_default_styles', 'DomainAgnostic::wp_defaults');
add_action('wp_default_scripts', 'DomainAgnostic::wp_defaults');
//add_filter ( 'option_siteurl', 'DomainAgnostic::abs' );
//add_filter ( 'option_home', 'DomainAgnostic::rel' );
/*add_filter ( 'option_ossdl_off_cdn_url', 'DomainAgnostic::abs' );
add_filter ( 'set_url_scheme', 'DomainAgnostic::abs' );
add_filter ( 'stylesheet_uri', 'DomainAgnostic::test' );
add_filter ( 'stylesheet_directory_uri', 'DomainAgnostic::test' );
add_filter ( 'template_directory_uri', 'DomainAgnostic::test' );*/
//add_filter ( 'theme_root_uri', 'DomainAgnostic::test' );
//add_filter ( 'style_loader_src', 'DomainAgnostic::style_loader_src' );

DomainAgnostic::checkOption('siteurl');
DomainAgnostic::checkOption('home');



//update_option( 'siteurl', DomainAgnostic::abs());
//update_option( 'home', DomainAgnostic::abs());