Validation tutorial

That's because you are using it wrong. If you are referring to $this->validate().
The tutorial command are a complete solution, you have created a three step process. Please refer to the post I made earlier, I copied the complete source code for it. You have created all those steps it does separately.

You are supposed to use it like this:

PHP Code:

$rules = [
    'site_admin_name'               => 'min_length[3]|max_lenght[250]',
    'site_admin_email'              => 'min_length[3]|max_length[250]|valid_email',
    'site_admin_pass_curr'          => 'required_without[site_admin_pass_new,site_admin_pass_new_retype]',
    'site_admin_pass_new'           => 'min_length[8]',
    'site_admin_pass_new_retype'    => 'matches[site_admin_pass_new]',
    'site_name'                     => 'max_length[200]',
    'site_description'              => 'min_length[3]',
    'site_keywords'                 => 'min_length[3]',
    'u_c_reason'                    => 'min_length[3]',
    'u_c_more_infos'                => 'min_length[3]',
];

if(
    $this->request->getMethod() === 'get' ||
    ! $this->validate($rules)
)
{
    // ...
}
else
{
    // ...
}