Unable to upload image with php - php

Question

I am trying to upload an image with php; but seems doesn't work, and I can't figure out why. When I try to insert only text without an image, it is working fine (I mean if I remove from php part all code for the image uploads); so I guess the error is in this part, but I can't find it.
This is the upload code that I currently use. Any help with this is appreciated.
if (isset($_POST['add'])) {
$text = $_POST['text'];
$title = $_POST['title'];
$category = $_POST['category'];
$fileName = $_FILES['userfile']['userfile'];
$tmpName = $_FILES['userfile']['tmp_name'];
// make a new image name
$ext = substr(strrchr($fileName, "."), 1);
// generate the random file name
$randName = md5(rand() * time());
// image name with extension
$myFile = $randName . '.' . $ext;
// save image path
$path = "/img/" . $myFile;
$result = move_uploaded_file($tmpName, $path);
if (!$result) {
echo "Error uploading image file <br />";
var_dump($_FILES);
exit;
} else {
$db = new mysqli("localhost", "user", "mypass", "mydb");
if (mysqli_connect_errno()) {
printf("Connect failed: %s<br/>", mysqli_connect_error());
}
mysqli_set_charset($db, "UTF8");
$query = "INSERT INTO posts (post_text, image_name, post_image, post_title, category) VALUES (?, ?, ?, ?, ?)";
$conn = $db->prepare($query);
if ($conn == TRUE) {
$conn->bind_param("ssssi",$text, $myFile, $path, $title, $category);
if (!$conn->execute()) {
echo 'error insert';
} else {
header("Location: index.php");
exit;
}
} else {
die("Error preparing Statement");
}
}
} else {
echo 'error';
}
And here is the form for the upload
<form method="post" action="postblog.php" enctype="multipart/form-data">
Title: <input type="text" name="title" id="title">
Category: <select name="category" id="category">
Desc :<br />
<textarea id="text" name="text" rows="15" cols="80" style="width: 80%"></textarea>
Image: <input type="file" name="userfile" />
<input type="submit" name="add" id="add" value="Добави">
</form>
The error is from here:
if (!$result) { echo "Error uploading image file "; }

Answer 1

change
$fileName = $_FILES['userfile']['userfile']; to $fileName = $_FILES['userfile']['name'];