Difficulty uploading & updating images to directory/MySQL using PHP - php

Question

I can upload images as a serialized array no problem, but all I need is to store the raw filename string on my database and I'm not sure where to start editing my pre-existing code get this to work. This should be easier but as a PHP novice I can't get it to work.
Essentially, I want to be able to upload images then display them on the front end of my site doing something like this:
<img src="img/<php echo $config->photo_a ?>"/>
My existing code is:
<?php
//connect to db //
session_start();
include('../config.php');
// check for login to use //
if (!$user->authenticated)
{
header('Location: login.php');
die();
}
//post form as array using class photo_loader//
if (isset($post->form_action))
{
$a = new photo_loader(false, $db);
$a->name = $post->name;
$image_files = array();
for ($i=1; $i<10; $i++)
{
if (isset($_FILES['file'.$i]['name']) && $_FILES['file'.$i]['name'] != "")
{
$img = new upload($_FILES['file'.$i], M_ENV_SITE_URL, M_ENV_SITE_ROOT);
$img->set_upload_target("/img/");
$n = $img->do_upload();
if (!$n)
{
$err = "Image file ".$i." too big or wrong file type.";
}
else
{
$image_files[] = $n;
$img->batchResize("/img/", "/img/", $n, array("320x240", "800x600"));
}
}
}
if (empty($image_files)) $err = "You must include at least one image.";
$a->value = $image_files;
if (!$err)
{
$a->create();
$succ = "Success!";
}
}
?>
Using a simple form like this:
<form action="" method="post" enctype="multipart/form-data">
<div class="control-group"><label for="file" class="control-label">Attach Slideshow Images:</label><div class="controls">
<?php
for ($i=1;$i<10;$i++)
{
echo "<input name=\"file".$i."\" type=\"file\" value=\"\" id=\"file".$i."\" />";
} ?>
</div></div>
<input type="hidden" name="name" value="photo_a">
<div class="form-actions">
<input type="submit" name="form_action" class="btn btn-large btn-primary" value="Save" />
</div>
</form>
and photo_loader.class.php looks like this:
<?php
class photo_loader
{
private $properties;
var $db;
function __construct($id, $dbase)
{
$this->db = $dbase;
if (is_numeric($id))
{
$sql = sprintf(
"SELECT * FROM minty_config
WHERE ID=%d",
$this->db->clean($id)
);
$result = $this->db->query($sql);
$fields = $this->db->fetch_array($result);
foreach ($fields as $k => $v)
{
$this->properties[$k] = $v;
}
$this->value = unserialize($this->value);
}
}
function __get($k)
{
return $this->properties[$k];
}
function __set($k, $v)
{
$this->properties[$k] = $v;
}
function update()
{
$sql = sprintf(
"UPDATE minty_config SET
name='%s',
value='%s'
WHERE ID=%d",
$this->db->clean($this->name),
serialize($this->value),
$this->ID
);
$this->db->query($sql);
}
function create()
{
$sql = sprintf(
"INSERT INTO minty_config
(name, value)
VALUES('%s', '%s')",
$this->db->clean($this->name),
unserialize($this->value)
);
$this->db->query($sql);
}
function delete()
{
$sql = sprintf(
"DELETE FROM minty_config
WHERE ID=%d",
$this->ID
);
$this->db->query($sql);
}
}
?>
I presume I need to remove the $image_files = array(); section but I don't know what to replace with! Seemingly keep making mistakes and returning blank pages with errors or not uploading the image. I can't see it being too diffuclt but I presume I'm going the wrong way about it. Many thanks in advance!!