CodeIgniter form validation valid_email not working - php

Question

I am trying to use CodeIgniter's form validation class. I've used the "valid_email" parameter, as can be seen from the code below, but even when an invalid email address is entered it still passes the validation check. I tested with the string: testing123
public function login()
{
$this->form_validation->set_rules('authEmail', 'trim|required|valid_email|xss_clean');
$this->form_validation->set_rules('authPassword', 'trim|required');
$email = $this->input->post('authEmail');
$password = $this->input->post('authPassword');
if($this->form_validation->run() === FALSE) {
$this->session->set_flashdata('formValidationError', validation_errors('<p class="error">', '</p>'));
redirect('/');
} else {
// Begin authentication
}
}
Anyone have any idea what I'm doing wrong or if this is a CodeIgniter issue?
To note, I am setting a flashdata session as opposed to using:
<?php echo validation_errors(); ?>
... this is because I am doing a redirect back to the homepage (which is the login page as it's a private site).

Answer 1

Try this:
public function login()
{
$this->load->library('form_validation');
$this->form_validation->set_rules('authEmail', 'Email', 'trim|required|valid_email|xss_clean');
$this->form_validation->set_rules('authPassword', 'Password', 'trim|required');
if($this->form_validation->run() !== false){
//validation passed
$email = $this->input->post('authEmail');
$password = $this->input->post('authPassword');
// Begin authentication
}
else {
$this->session->set_flashdata('formValidationError', validation_errors('<p class="error">', '</p>'));
redirect('/');
}
}

Answer 2

I'm just learning to use it as well, but don't you need three parameters? This is from their form validation page:
$this->form_validation->set_rules('email', 'Email', 'required');
From http://codeigniter.com/user_guide/libraries/form_validation.html#validationrules
The field name - the exact name you've given the form field.
A "human" name for this field, which will be inserted into the error message. For example, if your field is named "user" you might give it a human name of "Username". Note: If you would like the field name to be stored in a language file, please see Translating Field Names.
The validation rules for this form field.