Example:
 $iv = new InputValidator('POST');

 $iv->set_rules('email',     array('trim','esc_html','required','email'));
 $iv->set_rules('telephone', array('trim','esc_html','required','tel'));
 $iv->set_rules('password',  array('trim','esc_html','required'));
 $iv->set_rules('password',  'password_min_length', 8);

 $input  = $iv->input(array('email', 'telephone', 'password'), true);
 $errors = $iv->get_errors();

License:
 Released under the GPL license
  http://www.gnu.org/copyleft/gpl.html

  Copyright 2013 (email : [email protected])

    This program is free software; you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
    the Free Software Foundation; either version 2 of the License, or
    (at your option) any later version.

    This program is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    GNU General Public License for more details.

    You should have received a copy of the GNU General Public License
    along with this program; if not, write to the Free Software
    Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA