gistfile1.php

	public function resetPasswords() {
		
		$users = $this->User->find('all', array(
				'conditions' => array('username REGEXP' => '[0-9]+')
			)
		);
		
		foreach ($users as $user => $item) {
			
			$this->User->read(null, $item['User']['id']);
			
			//$newPasswd = $this->Auth->password(substr($item['User']['username'], 0, 4));
			$newPasswd = $this->Auth->password('2222');
			
			$this->User->set(array('User.password' => $newPasswd));
			
			$this->User->save();
		}
	}