Bootstrap include php inside modal - php

Question

So I am trying to insert a php script that gets values for a select element into a modal. But The php script works and gets the right info. But whenever i try and load the script into the modal like so:
<?php include 'script.php' ?>
My modal wont show up. These are my files:
Index.php
<div class="modal fade" id="upload" tabindex="-1">
<div class="modal-content">
<div class="modal-header">
<button type="button" class="close" data-dismiss="modal" aria-hidden="true">×</button>
<h4 class="modal-title">Tilføj en note</h4>
</div>
<form action="scripts/upload.php" method="post" enctype="multipart/form-data">
<div class="modal-body">
<div class="form-group">
<label for="name">Navn:</label>
<input type="text" class="form-control" name="name" placeholder="Navn på note..">
</div>
<div class="form-group">
<label for="name">Fag:</label>
<select class="form-control">
<?php include 'scripts/getClasses.php'; ?>
</select>
</div>
<div class="form-group">
<label for="name">Beskrivelse:</label>
<textarea name="description" data-provide="markdown" rows="10"></textarea>
</div>
<label for="file">Vælg fil:</label>
<input type="file" name="file" id="file"><br>
</div>
<div class="modal-footer">
<button type="button" class="btn btn-default" data-dismiss="modal">Luk</button>
<button type="submit" class="btn btn-success">Upload</button>
</div>
</form>
</div><!-- /.modal-content -->
</div><!-- /.modal -->
scripts/getClasses.php
<?php
require 'funcs.php';
$function = new functions;
$class = $function->getClasses();
$numclasses = count($class);
for($i=0;$i<$numclasses;$i++)
{
$id = $class[$i]['id'];
$name = $class[$i]['name'];
echo "<option value='".$id."'>".$name."</option>";
}
?>
snippet of funcs.php
public function getClasses()
//Function that gets all the classes. Used when user adds a new note.
{
require 'connect.php';
$count = 0;
$q = $db->prepare('SELECT * FROM classes ORDER BY name ASC');
$q->execute();
while($row = $q->fetch())
{
$results[$count]['id'] = $row['id'];
$results[$count]['name'] = $row['name'];
$count++;
}
return $results;
}