php.php

<?php

/*
 * Создает блок для с привязкой к плану по $plan_id и $position_number для вставки в xml
 */

use Integration\ZGR\Helper\PlanParser;
use Integration\ZGR\Model\ZgrExternalPlanItems;
use Integration\ZGR\Model\ZgrExternalPlans;

$plan_id = 260874;
$position_number = 111;

$zgr_external_plan = getExternalPlan($plan_id);

$zgr_external_plan_item = ZgrExternalPlanItems::model()->find([
	'parent_id' => $zgr_external_plan->id,
	'ordinal_number' => $position_number
]);

printLotPlanInfoExternal($zgr_external_plan, $zgr_external_plan_item);

function getExternalPlan($plan_id)
{
	$plan_parser = new PlanParser();
	$plan_parser->reloadPlan($plan_id);

	$zgr_external_plan =  ZgrExternalPlans::model()->find(['plan_id' => $plan_id]);

	if (null === $zgr_external_plan) {
		var_dump($plan_parser->getErrors());
		exit;
	}

	return $zgr_external_plan;
}

function printLotPlanInfoExternal(ZgrExternalPlans $plan, ZgrExternalPlanItems $position) {
	$xml = <<<XML
<t:lotPlanInfo>
	<t:planRegistrationNumber>{$plan->registration_number}</t:planRegistrationNumber>
	<t:planGuid>{$plan->data_guid}</t:planGuid>
	<t:positionNumber>{$position->ordinal_number}</t:positionNumber>
	<t:lotPlanPosition>COMMODITY</t:lotPlanPosition>
	<t:positionGuid>{$position->guid}</t:positionGuid>
</t:lotPlanInfo>
XML;
	echo '<pre>'.htmlspecialchars($xml).'</pre>';
}

php2.php

<?php

/*
 * Заготовка
 */

$string = file_get_contents('oos.xml');
$string = preg_replace('~(</?)[^>:=\s]+:~', '$1', $string);
$xml    = new \SimpleXMLElement($string);

$list = $xml->body->item->purchaseNoticeData->lots->lot;
if (!$list) {
	echo 'Другой формат xml с ООС';
	die();
}
$oos_guids = [];
foreach ($list as $lot) {
	$oos_guids[] = (string)$lot->guid;
}

$string = file_get_contents('our.xml');
$string = preg_replace('~(</?)[^>:=\s]+:~', '$1', $string);
$xml    = new \SimpleXMLElement($string);

$list = $xml->body->item->purchaseProtocolData->lotApplicationsList->protocolLotApplications;
if (!$list) {
	echo 'Другой формат xml у нас';
	die();
}
$our_guids = [];
foreach ($list as $lot) {
	$our_guids[] = (string)$lot->lot->guid;
}

if (count($oos_guids) != count($our_guids)) {
	echo 'Не сошлось количество гуидов';
	die();
}

$string = file_get_contents('our.xml');
echo htmlspecialchars(str_replace($our_guids, $oos_guids, $string));