HELP UNIX vs Windows

I am a PERL scripter and I am just getting into PHP. My first few pages are simple but I am running into a few problems when changing OS. I included below a piece of code that works fine in windows but not on a linux box. Not sure what the differences would be.... The problem is that on the windows platform all information is returned. On the linux platform the "$Details" variable is not populated. The nothing changes...so what could it be. The only thing I can think of is that maybe the version of php is different on the linux server. Here is the code.....after reading in a file with "|" deliminations while ($i < $length): $tok = strtok($cartFile[$i],"|"); $Category = $tok; $tok = strtok("|"); $SKU = $tok; $tok = strtok("|"); $Name = $tok; $tok = strtok("|"); $SubCategory = $tok; $tok = strtok("|"); $Price = $tok; $tok = strtok("|"); $Image1 = $tok; $tok = strtok("|"); $Image2 = $tok; $tok = strtok("|"); $OnSale = $tok; $tok = strtok("|"); $SalePrice = $tok; $tok = strtok("|"); $Details = $tok; $tok = strtok("|"); if($MCat == "$Category") { $Count++; if($OnSale == "1") { $Price = "<s>$$Price</s> <font color=\"red\">On Sale Now!</font> $$SalePrice"; } displayProd($Category,$SKU,$Name,$SubCategory,$Price,$Image1,$Image2,$OnSale ,$SalePrice,$Details); } $i++; endwhile;