bitrix. prev and next link

prev_next.php

<?php
/*
$cp = $this->__component; // объект компонента
if (is_object($cp)) {
    $cp->arResult['NAV_RESULT'] =  $arResult['NAV_RESULT'];
	$cp->SetResultCacheKeys(Array('NAV_RESULT'));
}
*/


$page = $arParams['PATH_URL'];

$prevPage = $arResult['NAV_RESULT']->NavPageNomer - 1;
$nextPage = $arResult['NAV_RESULT']->NavPageNomer + 1;
$NavNum = $arResult['NAV_RESULT']->NavNum;

// Сформируем чистый урл
$aGetNew = array();
foreach ($_GET as $key => $value) {
	if($key=='sort') $aGetNew['sort'] = $value;
	if(stripos($key, 'PAGEN_')===0) $aGetNew[$key] = $value;
}

if($arResult['NAV_RESULT']->NavPageNomer > 1){
	
	$aGetNew['PAGEN_'.$NavNum]  = $prevPage;
	$prevLink = $page.'?'.http_build_query($aGetNew,'','&amp;');
	$APPLICATION->AddHeadString('<link rel="prev" href="http://'.SITE_SERVER_NAME.$prevLink.'">',true);
}

if($arResult['NAV_RESULT']->NavPageNomer < $arResult['NAV_RESULT']->NavPageCount){
	$aGetNew['PAGEN_'.$NavNum]  = $nextPage;
	$nextLink = $page.'?'.http_build_query($aGetNew,'','&amp;');
	$APPLICATION->AddHeadString('<link rel="next" href="http://'.SITE_SERVER_NAME.$nextLink.'">',true);
}