Почему когда стоят два подряд xml отрабатывает в браузере только один?

Ниже код. Отрабатывает в браузере только сериалы.

<?php

function insert($name, $desc, $year, $category_id, $rating, $poster) {
$mysqli = new mysqli('localhost','root','','kinomonster');


if(mysqli_connect_errno()) {
print_f("Cоединение не установлено", mysqli_connect_error());
exit();
}

$mysqli->set_charset('utf8');

$query = "INSERT INTO movie VALUES(null, '$name', '$desc', '$year', NOW(), '$category_id', '$rating', '$poster')";

$result = false;

if ($mysqli->query($query)) {
$result = true;
}

return $result;

}

$xml=simplexml_load_file("xml/movies.xml") or die("Cannot create object");

$xml=simplexml_load_file("xml/serials.xml") or die("Cannot create object");

//echo count($xml);//

$title = null;
$title_orign = null;
$post = null;
$rating = null;
$year = null;

foreach ($xml as $movie_key => $movie) {
$title = $movie->title_russian;
$title_orign = $movie->title_original;
$year = $movie->year;

foreach ($movie->poster->big->attributes() as $poster_key => $poster) {
$post = $poster;
}

if($movie->imdb) {
$rating = $movie->imdb->attributes()['rating'];
} else {
$rating = null;
}


insert($title, $title_orign, $year, 1, $rating, $post);

}


echo "<pre>";
print_r($xml);
echo "</pre>";

?>