'strlen' question for zen cart

[joshuabaer23]

Looking for a tip here, since I am not much of a php guy.

Im working on a zen cart site, and Im having issues with the model numbers of my parts. Im trying to change the display of the model numbers that the users see.

 

Most of my model numbers are around 6 to 10 digits, and I want to add an additional 5 digits for store use, that the user can not see. I figure strlen and substr are probably the answer to this, but I am having trouble figuring how to implement it.

For those that know it, this is part of my includes/modules/product_listing.php file:

 

if ($listing_split->number_of_rows > 0) {

  $rows = 0;

  $listing = $db->Execute($listing_split->sql_query);

  $extra_row = 0;

  while (!$listing->EOF) {

    $rows++;

 

    if ((($rows-$extra_row)/2) == floor(($rows-$extra_row)/2)) {

      $list_box_contents[$rows] = array('params' => 'class="productListing-even"');

    } else {

      $list_box_contents[$rows] = array('params' => 'class="productListing-odd"');

    }

 

    $cur_row = sizeof($list_box_contents) - 1;

 

    for ($col=0, $n=sizeof($column_list); $col<$n; $col++) {

      $lc_align = '';

      switch ($column_list[$col]) {

        case 'PRODUCT_LIST_MODEL':

        $lc_align = '';

        $lc_text = $listing->fields ['products_model'];

        break;

        case 'PRODUCT_LIST_NAME':

        $lc_align = '';

 

I have highlighted what I "think" is the correct area that I need to adjust, to chop off 5 characters.

Can anyone help with this?