How we can extend Varien_File_Csv class in magento?

Question

I want to open CSV file in a+ mode for append content. I open Varien_File_Csv class and check for that but I did not found any option for open file in a+ mode.

Answer 1

You can use a "drop-in" trick.

Copy it in: app/code/community/Varien/File/Csv.php and change it according to your needings.

BEWARE: It will have system-wide effects, so make sure you are not making anything disruptive.

Otherwise you could use Varien_Io_File. See methods:

• streamOpen (param $mode)
• streamReadCsv
• streamWriteCsv