Script for multiple image upload doesn't work properly - php

Question

I trying to make script which upload multiple images into folder on server and save name and some other info in database. The script is working fine until I tried to add parameters to save type, size and category. I I remove this 3 lines below it is working.
$fileSize = $_FILES['user_files']['size'];
$fileType = $_FILES['user_files']['type'];
$album = $_POST['image_album'];
This is the script and I would like someone to help me with this.
if (isset($_POST["sub2"])) {
// include resized library
require_once('php-image-magician/php_image_magician.php');
$msg = "";
$valid_image_check = array("image/gif", "image/jpeg", "image/jpg", "image/png", "image/bmp");
if (count($_FILES["user_files"]) > 0) {
$folderName = "uploads/";
$sql = "INSERT INTO images (image_name, image_size, image_type, image_album) VALUES (:img, :size, :type, :album)";
$stmt = $pdo->prepare($sql);
for ($i = 0; $i < count($_FILES["user_files"]["name"]); $i++) {
if ($_FILES["user_files"]["name"][$i] <> "") {
$image_mime = strtolower(image_type_to_mime_type(exif_imagetype($_FILES["user_files"]["tmp_name"][$i])));
// if valid image type then upload
if (in_array($image_mime, $valid_image_check)) {
$ext = explode("/", strtolower($image_mime));
$ext = strtolower(end($ext));
$filename = rand(10000, 990000) . '_' . time() . '.' . $ext;
$filepath = $folderName . $filename;
$fileSize = $_FILES['user_files']['size']; <---- // THIS
$fileType = $_FILES['user_files']['type']; // THIS
$album = $_POST['image_album']; // AND THIS
if (!move_uploaded_file($_FILES["user_files"]["tmp_name"][$i], $filepath)) {
$emsg .= "Error while uploading - <strong>" . $_FILES["user_files"]["name"][$i] . "</strong><br>";
$counter++;
} else {
$smsg .= "Image <strong>" . $_FILES["user_files"]["name"][$i] . "</strong> is added. <br>";
$magicianObj = new imageLib($filepath);
$magicianObj->resizeImage(100, 100);
$magicianObj->saveImage($folderName . 'thumb/' . $filename, 100);
/* * ****** insert into database starts ******** */
try {
$stmt->bindValue(":img", $filename);
$stmt->bindValue(":size", $fileSize);
$stmt->bindValue(":type", $fileType);
$stmt->bindValue(":album", $album);
$stmt->execute();
$result = $stmt->rowCount();
if ($result > 0) {
// file uplaoded successfully.
} else {
// failed to insert into database.
}
} catch (Exception $ex) {
$emsg .= "<strong>" . $ex->getMessage() . "</strong>. <br>";
}
/* * ****** insert into database ends ******** */
}
} else {
$emsg .= "This file <strong>" . $_FILES["user_files"]["name"][$i] . "</strong> isn't image. <br>";
}
}
}
And this is the form
<form name="f2" action="" method="post" enctype="multipart/form-data">
<fieldset>
Album
<select name="image_album">
<option value="1">Album 1</option>
<option value="2">Album 2</option>
<option value="3" >Album 3</option>
<option value="4" >Album 4</option>
<option value="5">Album 5</option>
</select>
<input class="files" name="user_files[]" type="file" ><span><a href="javascript:void(0);" class="add" >Add more</a></span>
<div><input type="submit" class="submit" name="sub2" value="Качи" /> </div>
</fieldset>
</form>