[Solved] Regex Check Codeigniter Form Validation

In codeigniter callback form validation

How can I check if $password has at least one upper case letter?

PHP Code:

<?php

class Login extends CI_Controller {

 public function __construct() {
 parent::__construct();
 }

 public function index() { 
 $data['title'] = 'Administration';

 $this->form_validation->set_rules('username', 'Username', 'trim|required');
 $this->form_validation->set_rules('password', 'Password', 'trim|required|callback_regex');

 if ($this->form_validation->run() == FALSE) {

 $this->load->view('common/header.tpl', $data);
 $this->load->view('common/login.tpl', $data);
 $this->load->view('common/footer.tpl');

 } else {

 redirect('common/dashboard');

 }
 }

 public function regex($password) {
 if ($password == FALSE) {
 $this->form_validation->set_message('regex', 'Password must contain at least one upper case letter');
 return false;
 } else {
 return true;
 }
 }
} 


You could check for ascii code of each char in password, for ex:

PHP Code:

function hasCapital($str) {
        $found = false;
        for ($i = 0; $i < strlen($str); $i++) {
            if (ord($str[$i]) >= 65 && ord($str[$i]) <= 90) {
                $found = true;
                break;
            }
        }
        return $found;
} 


That worked but is there away to have it in a MY_Form_validation library so do not have to enter it as call back?

There's only one rule - please don't tell anyone to go and read the manual.  Sometimes the manual just SUCKS!