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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: Aidan Lister <aidan@php.net>                                |

  16  // +----------------------------------------------------------------------+

  17  //

  18  // $Id: php_strip_whitespace.php,v 1.10 2005/01/26 04:55:13 aidan Exp $

  19  
  20  
  21  /**

  22   * Replace php_strip_whitespace()

  23   *

  24   * @category    PHP

  25   * @package     PHP_Compat

  26   * @link        http://php.net/function.php_strip_whitespace

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

  28   * @version     $Revision: 1.10 $

  29   * @since       PHP 5

  30   * @require     PHP 4.0.0 (user_error) + Tokenizer extension

  31   */
  32  if (!function_exists('php_strip_whitespace')) {
  33      function php_strip_whitespace($file)
  34      {
  35          // Sanity check

  36          if (!is_scalar($file)) {
  37              user_error('php_strip_whitespace() expects parameter 1 to be string, ' .
  38                  gettype($file) . ' given', E_USER_WARNING);
  39              return;
  40          }
  41  
  42          // Load file / tokens

  43          $source = implode('', file($file));
  44          $tokens = token_get_all($source);
  45  
  46          // Init

  47          $source = '';
  48          $was_ws = false;
  49  
  50          // Process

  51          foreach ($tokens as $token) {
  52              if (is_string($token)) {
  53                  // Single character tokens

  54                  $source .= $token;
  55              } else {
  56                  list($id, $text) = $token;
  57                  
  58                  switch ($id) {
  59                      // Skip all comments

  60                      case T_COMMENT:
  61                      case T_ML_COMMENT:
  62                      case T_DOC_COMMENT:
  63                          break;
  64  
  65                      // Remove whitespace

  66                      case T_WHITESPACE:
  67                          // We don't want more than one whitespace in a row replaced

  68                          if ($was_ws !== true) {
  69                              $source .= ' ';
  70                          }
  71                          $was_ws = true;
  72                          break;
  73  
  74                      default:
  75                          $was_ws = false;
  76                          $source .= $text;
  77                          break;
  78                  }
  79              }
  80          }
  81  
  82          return $source;
  83      }
  84  }
  85  
  86  ?>