$this->input->post('do') failed

[eluser]OwanH[/eluser]

And i debugged the post array with

print_r($_POST);

but the return value was null…

Hmm, the fact that the print_r function returned a value of null means that the $_POST array is not being created by PHP interpreter when you submit the form. Try:

1. Checking the rendered form, meaning the HTML form code that the browser loads when loading the form, and make sure that the method="post" attribute is set.

2. Creating a very simple page with a single form, couple of fields, upload it to your server, fill it out, submit it to a simple PHP script that just dumps the $_POST array data to see if it's empty or not. Do NOT use the CI framework for this, just straight native PHP. This will identify if this is a server issue. If not then I really don't know what else I could advise.