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   1  <?php
   2  // +----------------------------------------------------------------------+

   3  // | PHP Version 4                                                        |

   4  // +----------------------------------------------------------------------+

   5  // | Copyright (c) 1997-2004 The PHP Group                                |

   6  // +----------------------------------------------------------------------+

   7  // | This source file is subject to version 3.0 of the PHP license,       |

   8  // | that is bundled with this package in the file LICENSE, and is        |

   9  // | available at through the world-wide-web at                           |

  10  // | http://www.php.net/license/3_0.txt.                                  |

  11  // | If you did not receive a copy of the PHP license and are unable to   |

  12  // | obtain it through the world-wide-web, please send a note to          |

  13  // | license@php.net so we can mail you a copy immediately.               |

  14  // +----------------------------------------------------------------------+

  15  // | Authors: Michael Wallner <mike@php.net>                              |

  16  // |          Aidan Lister <aidan@php.net>                                |

  17  // +----------------------------------------------------------------------+

  18  //

  19  // $Id: convert_uuencode.php,v 1.7 2005/01/26 04:55:13 aidan Exp $

  20  
  21  
  22  /**

  23   * Replace convert_uuencode()

  24   *

  25   * @category    PHP

  26   * @package     PHP_Compat

  27   * @link        http://php.net/function.convert_uuencode

  28   * @author      Michael Wallner <mike@php.net>

  29   * @author      Aidan Lister <aidan@php.net>

  30   * @version     $Revision: 1.7 $

  31   * @since       PHP 5

  32   * @require     PHP 4.0.0 (user_error)

  33   */
  34  if (!function_exists('convert_uuencode')) {
  35      function convert_uuencode($string)
  36      {
  37          // Sanity check

  38          if (!is_scalar($string)) {
  39              user_error('convert_uuencode() expects parameter 1 to be string, ' .
  40                  gettype($string) . ' given', E_USER_WARNING);
  41              return false;
  42          }
  43  
  44          $u = 0;
  45          $encoded = '';
  46          
  47          while ($c = count($bytes = unpack('c*', substr($string, $u, 45)))) {
  48              $u += 45;
  49              $encoded .= pack('c', $c + 0x20);
  50  
  51              while ($c % 3) {
  52                  $bytes[++$c] = 0;
  53              }
  54  
  55              foreach (array_chunk($bytes, 3) as $b) {
  56                  $b0 = ($b[0] & 0xFC) >> 2;
  57                  $b1 = (($b[0] & 0x03) << 4) + (($b[1] & 0xF0) >> 4);
  58                  $b2 = (($b[1] & 0x0F) << 2) + (($b[2] & 0xC0) >> 6);
  59                  $b3 = $b[2] & 0x3F;
  60                  
  61                  $b0 = $b0 ? $b0 + 0x20 : 0x60;
  62                  $b1 = $b1 ? $b1 + 0x20 : 0x60;
  63                  $b2 = $b2 ? $b2 + 0x20 : 0x60;
  64                  $b3 = $b3 ? $b3 + 0x20 : 0x60;
  65                  
  66                  $encoded .= pack('c*', $b0, $b1, $b2, $b3);
  67              }
  68  
  69              $encoded .= "\n";
  70          }
  71          
  72          // Add termination characters

  73          $encoded .= "\x60\n";
  74  
  75          return $encoded;
  76      }
  77  }
  78  
  79  ?>