mainpage.php

См. документацию.

<?php
 
require_once($_SERVER["DOCUMENT_ROOT"] . "/bitrix/modules/main/start.php");
 
class CMainPage
{
    public static function GetSiteByHost()
    {
        $cur_host = $_SERVER["HTTP_HOST"];
        $arURL = parse_url("http://" . $cur_host);
        if ($arURL["scheme"] == '' && $arURL["host"] != '')
        {
            $CURR_DOMAIN = $arURL["host"];
        }
        else
        {
            $CURR_DOMAIN = $cur_host;
        }
 
        if (mb_strpos($CURR_DOMAIN, ':') > 0)
        {
            $CURR_DOMAIN = mb_substr($CURR_DOMAIN, 0, mb_strpos($CURR_DOMAIN, ':'));
        }
        $CURR_DOMAIN = trim($CURR_DOMAIN, "\t\r\n\0 .");
 
        global $DB;
        $strSql =
            "SELECT L.LID as SITE_ID ".
            "FROM b_lang L, b_lang_domain LD ".
            "WHERE L.ACTIVE='Y' ".
            "   AND L.LID=LD.LID ".
            "   AND '" . $DB->ForSql("." . $CURR_DOMAIN, 255) . "' LIKE " . $DB->Concat("'%.'", "LD.DOMAIN") . " " .
            "ORDER BY " . $DB->Length("LD.DOMAIN") . " DESC, L.SORT";
 
        $res = $DB->Query($strSql);
        if ($ar_res = $res->Fetch())
        {
            return $ar_res["SITE_ID"];
        }
 
        $sl = CSite::GetDefList();
        while ($slang = $sl->Fetch())
        {
            if ($slang["DEF"] == "Y")
            {
                return $slang["SITE_ID"];
            }
        }
 
        return false;
    }
 
    public static function GetSiteByAcceptLanguage($compare_site_id=false)
    {
        $site_id = false;
        $last_site_id = '';
        $arSites = [];
 
        $rsSites = CSite::GetDefList();
        while ($arSite = $rsSites->Fetch())
        {
            $last_site_id = $arSite["ID"];
            if ($arSite["DEF"] == "Y")
            {
                $site_id = $arSite["ID"];
            }
            $arSites[] = $arSite;
        }
 
        $arUserLang = explode(",", $_SERVER["HTTP_ACCEPT_LANGUAGE"]);
        if (is_array($arUserLang))
        {
            foreach ($arUserLang as $user_lid)
            {
                $user_lid = mb_strtolower(mb_substr($user_lid, 0, 2));
                foreach ($arSites as $arSite)
                {
                    $sid = ($compare_site_id) ? mb_strtolower($arSite["ID"]) : mb_strtolower($arSite["LANGUAGE_ID"]);
                    if ($user_lid == $sid)
                    {
                        return $arSite["ID"];
                    }
                }
            }
        }
        if ($site_id == '')
        {
            return $last_site_id;
        }
        return $site_id;
    }
 
    public static function RedirectToSite($site)
    {
        if ($site == '')
        {
            return;
        }
        $db_site = CSite::GetByID($site);
        if ($arSite = $db_site->Fetch())
        {
            $arSite["DIR"] = rtrim($arSite["DIR"], ' \/');
            if ($arSite["DIR"] != '')
            {
                LocalRedirect(($arSite["SERVER_NAME"] != '' ? "http://" . $arSite["SERVER_NAME"] : '') . $arSite["DIR"] . $_SERVER["REQUEST_URI"], true);
            }
        }
    }
 
    public static function GetIncludeSitePage($site)
    {
        if ($site == '')
        {
            return false;
        }
        $db_site = CSite::GetByID($site);
        if ($arSite = $db_site->Fetch())
        {
            $arSite["DIR"] = rtrim($arSite["DIR"], ' \/');
            $cur_page = GetPagePath();
            if ($arSite["DIR"] != '')
            {
                $_SERVER["REQUEST_URI"] = $arSite["DIR"] . $cur_page;
                return $_SERVER["DOCUMENT_ROOT"] . $_SERVER["REQUEST_URI"];
            }
        }
        return false;
    }
}