uploading multiple photos to specific location - php

Question

I've been trying to create something that will upload multiple photos to a specific location and change it's name, tried to loop through files but something is not working and I quite can't figure out what that is! So please take a look and tell me what is wrong so I can learn and not make the same mistake again ! Thanks
if($_SERVER['REQUEST_METHOD'] == 'POST')
{
if(isset($_POST['product_submit']))
{
if(!empty($_POST['product_name']) && !empty($_POST['product_author']) && !empty($_POST['product_price']) && empty($_POST['product_search']))
{
if(is_numeric($_POST['product_price']))
{
$auth_key = round(microtime(true));
if(isset($_FILES['photos']) && !empty($_FILES['photos']))
{
$image_path = "product_images";
foreach ($_FILES['photos']['name'] as $name => $value)
{
$filename = stripslashes($_FILES['photos']['name'][$name]);
$extension = getExtension($filename);
$extension = strtolower($extension);
if (($extension != "jpg") && ($extension != "jpeg") && ($extension != "png") && ($extension != "gif"))
{
$_SESSION['sucess'] = "Invalid extension.";
header("location: index.php");
exit();
}
else
{
$size = filesize($_FILES['photos']['tmp_name'][$name]);
if($size > 5120000)
{
$_SESSION['sucess'] = "You have exceeded the size limit.";
header("location: index.php");
exit();
}
$temp = explode('.', $filename);
$newfilename = mt_rand() . '_product.' . end($temp);
$name_path = "product_images/".$newfilename;
$suc = move_uploaded_file($_FILES['photos']['tmp_name'][$name], $name_path);
if($suc)
{
$stmt = $connection->prepare("INSERT INTO images (auth_id, photo_location) VALUES (:code, :location)");
$stmt->bindParam(':code', $auth_key, PDO::PARAM_STR);
$stmt->bindParam(':location', $name_path, PDO::PARAM_STR);
$stmt->execute();
}
else
{
$_SESSION['sucess'] = "Something went wrong!";
header("location: index.php");
exit();
}
}
}
}
$query = "INSERT INTO products (name, author, price, date, code) VALUES (:name, :author, :price, NOW(), :code)";
$stmt = $connection->prepare($query);
$stmt->bindParam(':name', $_POST['product_name'], PDO::PARAM_STR);
$stmt->bindParam(':author', $_POST['product_author'], PDO::PARAM_STR);
$stmt->bindParam(':price', $_POST['product_price'], PDO::PARAM_STR);
$stmt->bindParam(':code', $auth_key, PDO::PARAM_STR);
$stmt->execute();
if($stmt)
{
$_SESSION['sucess'] = "Data inserted to database.";
header("location: index.php");
exit();
}
else
{
$_SESSION['error'] = "Error while submiting data to database.";
header("location: index.php");
exit();
}
}
}
elseif (empty($_POST['product_name']) && empty($_POST['product_author']) && empty($_POST['product_price']) && !empty($_POST['product_search']))
{
$_SESSION['error'] = "You can't leave anything empty!";
header("location: index.php");
exit();
}
}
}

Answer 1

if your input file's name is photo[] you should use:
for($i = 0; $i < count($_FILES['photo']); $i++)
and then:
$_FILES['photo'][$i]['tmp_name']
and so on