Activate headers after php request is complete - php

Question

I am currently working on a site where users can upload images up to 10mb. When the users press upload, the file is stored in a directory on the server, and then the page is redirected through the use of a header. Note that I also put ob start() at the beginning of the script. The problem I'm having is that the header redirect activates before the request is complete, so users get logged out, or an internal server error occurs. Same thing happens when you delete the large file. I've tried removing the redirect and its fine, so i'm sure that's the problem. Is there a way to get the header redirect only after the php request (image upload) is complete?
Thanks!
Edit: Code sample
if (empty($errors)) {
// Get the filename minus the file extension:
$filename = substr($image["name"], 0, strrpos($image["name"], "."));
// Append the appropriate extension
$filename .= $validMimes[$image['type']];
$location = "/home/shoplft/users/$user_id/$foldername/$filename";
move_uploaded_file($tmp_name, $location);
if($secondcategory=="0") {
mysql_query("INSERT INTO products (users_user_id, name, brand, city, country, store, website, price, keywords, productlocation, filename) VALUES ('$user_id', '$productname', '$productbrand', '$city', '$country', '$store', '$website', '$price', '$tagwords', '$location', '$filename')") or die('Invalid query: ' . mysql_error());
$pic_id = mysql_insert_id();
mysql_query("INSERT INTO categories (products_products_id, products_users_user_id, category) VALUES('$pic_id', '$user_id', '$firstcategory')");
if(!empty($price)) {
mysql_query("INSERT INTO svalues (products_products_id, products_users_user_id, svalue) VALUES ('$pic_id', '$user_id', '$price') ");
}
}
else {
mysql_query("INSERT INTO products (users_user_id, name, brand, city, country, store, website, price, keywords, productlocation, filename) VALUES ('$user_id', '$productname', '$productbrand', '$city', '$country', '$store', '$website', '$price', '$tagwords', '$location', '$filename')") or die('Invalid query: ' . mysql_error());
$pic_id = mysql_insert_id();
mysql_query("INSERT INTO categories (products_products_id, products_users_user_id, category) VALUES('$pic_id', '$user_id', '$firstcategory')");
mysql_query("INSERT INTO categories (products_products_id, products_users_user_id, category) VALUES('$pic_id', '$user_id', '$secondcategory')");
if(!empty($price)) {
mysql_query("INSERT INTO svalues (products_products_id, products_users_user_id, svalue) VALUES ('$pic_id', '$user_id', '$price') ");
}
}
header("Location: product.php?id=$pic_id");//prolly should separate data processing from output
}

Answer 1

Try this
if (empty($errors)) {
// Get the filename minus the file extension:
$filename = substr($image["name"], 0, strrpos($image["name"], "."));
// Append the appropriate extension
$filename .= $validMimes[$image['type']];
$location = "/home/shoplft/users/$user_id/$foldername/$filename";
if(!#copy($tmp_name, $location))
{
$errors[] = 'Error';
}
if (empty($errors))
{
if($secondcategory=="0") {
mysql_query("INSERT INTO products (users_user_id, name, brand, city, country, store, website, price, keywords, productlocation, filename) VALUES ('$user_id', '$productname', '$productbrand', '$city', '$country', '$store', '$website', '$price', '$tagwords', '$location', '$filename')") or die('Invalid query: ' . mysql_error());
$pic_id = mysql_insert_id();
mysql_query("INSERT INTO categories (products_products_id, products_users_user_id, category) VALUES('$pic_id', '$user_id', '$firstcategory')");
if(!empty($price)) {
mysql_query("INSERT INTO svalues (products_products_id, products_users_user_id, svalue) VALUES ('$pic_id', '$user_id', '$price') ");
}
}
else {
mysql_query("INSERT INTO products (users_user_id, name, brand, city, country, store, website, price, keywords, productlocation, filename) VALUES ('$user_id', '$productname', '$productbrand', '$city', '$country', '$store', '$website', '$price', '$tagwords', '$location', '$filename')") or die('Invalid query: ' . mysql_error());
$pic_id = mysql_insert_id();
mysql_query("INSERT INTO categories (products_products_id, products_users_user_id, category) VALUES('$pic_id', '$user_id', '$firstcategory')");
mysql_query("INSERT INTO categories (products_products_id, products_users_user_id, category) VALUES('$pic_id', '$user_id', '$secondcategory')");
if(!empty($price)) {
mysql_query("INSERT INTO svalues (products_products_id, products_users_user_id, svalue) VALUES ('$pic_id', '$user_id', '$price') ");
}
}
header("Location: product.php?id=$pic_id");//prolly should separate data processing from output
}
}