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   1  <?php
   2  // This file is part of Moodle - http://moodle.org/
   3  //
   4  // Moodle is free software: you can redistribute it and/or modify
   5  // it under the terms of the GNU General Public License as published by
   6  // the Free Software Foundation, either version 3 of the License, or
   7  // (at your option) any later version.
   8  //
   9  // Moodle is distributed in the hope that it will be useful,
  10  // but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12  // GNU General Public License for more details.
  13  //
  14  // You should have received a copy of the GNU General Public License
  15  // along with Moodle.  If not, see <http://www.gnu.org/licenses/>.
  16  
  17  /**
  18   * Shared utility functions for session handlers.
  19   *
  20   * This contains functions that are shared between two or more handlers.
  21   *
  22   * @package core
  23   * @copyright 2014 The Open University
  24   * @license http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
  25   */
  26  
  27  namespace core\session;
  28  
  29  defined('MOODLE_INTERNAL') || die();
  30  
  31  /**
  32   * Shared utility functions for session handlers.
  33   *
  34   * This contains functions that are shared between two or more handlers.
  35   *
  36   * @package core
  37   * @copyright 2014 The Open University
  38   * @license http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
  39   */
  40  abstract class util {
  41      /**
  42       * Convert a connection string to an array of servers
  43       *
  44       * EG: Converts: "abc:123, xyz:789" to
  45       *
  46       *  array(
  47       *      array('abc', '123'),
  48       *      array('xyz', '789'),
  49       *  )
  50       *
  51       * @copyright  2013 Moodlerooms Inc. (http://www.moodlerooms.com)
  52       * @license    http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
  53       * @author     Mark Nielsen
  54       *
  55       * @param string $str save_path value containing memcached connection string
  56       * @return array
  57       */
  58      public static function connection_string_to_memcache_servers($str) {
  59          $servers = array();
  60          $parts   = explode(',', $str);
  61          foreach ($parts as $part) {
  62              $part = trim($part);
  63              $pos  = strrpos($part, ':');
  64              if ($pos !== false) {
  65                  $host = substr($part, 0, $pos);
  66                  $port = substr($part, ($pos + 1));
  67              } else {
  68                  $host = $part;
  69                  $port = 11211;
  70              }
  71              $servers[] = array($host, $port);
  72          }
  73          return $servers;
  74      }
  75  }