Can't access admin/sign-in

[Cyndi]

Tried uploading backup copy of shop after installing B1G1 free module, which didn't work. Store "front" is appearing but I can't get in the back end. Any help appreciated,.

Error log says:
[13-Sep-2011 07:48:20] PHP Fatal error: Cannot redeclare zen_update_products_price_sorter() (previously declared in /home/sprinks/public_html/shop/zc_admin/includes/functions/general.php:2680) in /home/sprinks/public_html/shop/zc_admin/includes/functions/functions_prices.php on line 1334

And this is line 1325 to 1334 in functions_prices.php:

// set the products_price_sorter
  function zen_update_products_price_sorter($product_id) {
    global $db;

    $products_price_sorter = zen_get_products_actual_price($product_id);

    $db->Execute("update " . TABLE_PRODUCTS . " set
                  products_price_sorter='" . zen_db_prepare_input($products_price_sorter) . "'
                  where products_id='" . (int)$product_id . "'");
  } 

[schoolboy]

When a module is incorrectly installed, or if it conflicts with other add-ons, and you then want to remove it, the procedure is (in effect) to do the REVERSE of what you did when you installed it.

As the problem is with the ADMIN side, it would appear that one of your add-ons has over-written a CORE admin file.

The easiest way to find out what file was over-written is to look at the README file that came with the module, because the author should have listed which CORE files will be over-written.

It is then a case of removing the overwrite file(s), and loading up a fresh file from a download of the zencart software (of the SAME version you are using).

In some cases, modules will make database changes. It is usually necessary to REMOVE these changes - and again, the author of the module should have provided instructions (or an UNINSTALL.SQL file) for you to do these changes.

As always, before any changes are made to the database, create a full backup.

[Cyndi]

Oh, I am so not fluent with Zen-Cart. I have two other installed modules that work great and wondering if I upload new core files if it will affect them. <banging head on desk>

[Cyndi]

Schoolboy, thank you, thank you. I reuploaded the changed files like you said and I'm in....virtual hugs to you!

[schoolboy]

Great... your first successful "fix-it" project is always a big confidence booster.

You will learn (usually the hard way, like most of us), to follow certain steps that reduce the chances of error, when you make modifications to your site.

I have many posts on the forum that show some of these techniques - particularly for novice users, so look around a bit for them.

Also, spend a lot of time in the tutorials section of this forum. That is how I learned much of what is necessary for sensible management of your installation.

[Cyndi]

I definitely will take your advice! I'm so used to WordPress, Zen-Cart is a whole other animal.

[schoolboy]

Ironically, I find customising WordPress files to be a "Pain in the A", because it is more complicated to "manipulate" the code. Of course WP is designed with "non-technical" users very much in mind - and in this respect it is arguably the best program of its type.

It's possible with WP to get a really great looking, and superbly performing site, without even having even the most basic of programming skills.