Drop Down Menus & Validation

[eluser]alpar[/eluser]
if you have some values that don't change, like a gender you make a simple test

if (! in_array($this->input->post('gender'),array('male','female'))) return FALSE;

if you have many values, you can check them against a database (don't forget to escape the input) , if you have a date, check for the date to be correct, how you do it depends on what kind of data are you dealing with