designoir

<?php

/**
 * class Token
 * Copyright (C) 2006  Dao Gottwald
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2.1 of the License, or (at your option) any later version.
 *
 * This library 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
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
 *
 * Contact information:
 *   Dao Gottwald  <dao at design-noir.de>
 *   Herltestraße 12
 *   D-01307, Germany
 *
 * @version  1.0
 */

class Token {
    protected
        $data_token = array(),
        $data_strings = array();
    
    private
        $delimiterA,
        $delimiterB;
    
    public function __construct ($a = '', $b = '') {
        $this->delimiterA = $a;
        $this->delimiterB = $b;
    }
    
    public function add ($string) {
        $hash = md5 ($string);
        if (!isset ($this->data_token[$hash])) {
            $this->data_token[$hash] = $this->delimiterA . md5 ($hash. uniqid (mt_rand(), true)) . $this->delimiterB;
            $this->data_strings[$hash] = $string;
        }
        return $this->data_token[$hash];
    }
    
    public function encode_string ($string, &$text) {
        if (is_array ($string)) {
            foreach ($string as &$s) {
                $this->encode_string ($s, $text);
            }
        } else {
            $text = str_replace ($string, $this->add ($string), $text);
        }
    }
    
    public function encode (&$text) {
        $text = str_replace ($this->data_strings, $this->data_token, $text);
    }
    
    public function decode (&$text) {
        $text = str_replace ($this->data_token, $this->data_strings, $text);
    }
}

?>