Form Validation - Requiring one input OR the other

[eluser]gstjohn[/eluser]
Small note: empty() cannot check the return value of a function or method.

Code:

if (empty($this->input->post('zipcode'))) { ... }

You will get an error saying:

Fatal error: Can't use method return value in write context in ...

Corrected syntax will need to be:

Code:

$zipcode = $this->input->post('zipcode');
if (empty($zipcode)) { ... }