validation or form_validation, Whats the difference

[eluser]glasses092[/eluser]
Hi everyone,

I am just getting started with CodeIgniter and am wondering what is the difference between these 2 libraries:

Code:

$this->load->library('validation');
$this->load->library('form_validation');

In some forum posts people use the first one and in other posts the other one is used???

Are they the same thing?
What one should I use?

Thanks,

Martin