Сравнить поля в xml файлах

$i=0;
$array_id_old_feed = [];
$array_id_new_feed = [];
$xml = simplexml_load_file('VBHy6J9p0cSJyNpgzftWAyeemploypsg.xml');

$p_cnt = count($xml->channel->item);
echo 'Count for item old feed: '.$p_cnt.'<br/>';
foreach ($xml->channel->item as $value){
    $i++;
	//echo $i.' '.$value->id . '<br/>';
	array_push($array_id_old_feed ,strval($value->id));	
} 

$xml = simplexml_load_file('E-Commerce_Product_List.xml');
$p_cnt = count($xml->channel->item);
echo 'Count for item new feed: '.$p_cnt.'<br/>';
$i=0;
foreach ($xml->channel->item as $value){
	$i++;
  //  echo $i.' '.$value->id . '<br/>';
	array_push($array_id_new_feed ,strval($value->id));	
}
$i=0;
echo '<br/>Search differnce id between old and new<br/>';
foreach($array_id_old_feed as $array_id_old_feed_item){
	//var_dump(in_array($array_id_old_feed_item, $array_id_new_feed));
	if(!in_array($array_id_old_feed_item, $array_id_new_feed)){
		$i++;
		echo '<br/>'.$i.' '.$array_id_old_feed_item;		
	}
}
echo '<br/>'.$i.' differences finded between old and new<br/>';
echo '<br/>Search differnce id between new and old<br/>';
$i=0;
foreach($array_id_new_feed as $array_id_new_feed_item){
	//var_dump(!in_array($array_id_new_feed_item, $array_id_old_feed));
	if(!in_array($array_id_new_feed_item, $array_id_old_feed)){
		$i++;
		echo '<br/>'.$i.' '.$array_id_new_feed_item;		
	}
}
echo '<br/>'.$i.' differences finded between new and old<br/>';