libraries/ob.lib.php3

   1 <?php
   2 /* $Id$ */
   3 // vim: expandtab sw=4 ts=4 sts=4:
   4
   5
   6 if (!defined('PMA_OB_LIB_INCLUDED')) {
   7     define('PMA_OB_LIB_INCLUDED', 1);
   8
   9     # Output buffer functions for phpMyAdmin
  10     #
  11     # Copyright 2001 Jeremy Brand <jeremy@nirvani.net>
  12     # http://www.jeremybrand.com/Jeremy/Brand/Jeremy_Brand.html
  13     #
  14     # Check for all the needed functions for output buffering
  15     # Make some wrappers for the top and bottoms of our files.
  16
  17     /**
  18      * This function be used eventually to support more modes.  It is needed
  19      * because both header and footer functions must know what each other is
  20      * doing.
  21      *
  22      * @return  integer  the output buffer mode
  23      */
  24     function PMA_outBufferModeGet()
  25     {
  26         if (PMA_PHP_INT_VERSION >= 40000 && @function_exists('ob_start')) {
  27             $mode = 1;
  28         } else {
  29             $mode = 0;
  30         }
  31
  32         // If a user sets the output_handler in php.ini to ob_gzhandler, then
  33         // any right frame file in phpMyAdmin will not be handled properly by
  34         // the browser. My fix was to check the ini file within the
  35         // PMA_outBufferModeGet() function.
  36         //
  37         // (Patch by Garth Gillespie, modified by Marc Delisle)
  38         if (PMA_PHP_INT_VERSION >= 40000 && @ini_get('output_handler')) {
  39             if (@ini_get('output_handler') == 'ob_gzhandler') {
  40                 $mode = 0;
  41             }
  42         } else if (PMA_PHP_INT_VERSION >= 40000) {
  43             if (@get_cfg_var('output_handler') == 'ob_gzhandler') {
  44                 $mode = 0;
  45             }
  46         }
  47         // End patch
  48
  49         // If output buffering is enabled in php.ini it's not possible to
  50         // add the ob_gzhandler without a warning message from php 4.3.0.
  51         // Being better safe than sorry, check for any existing output handler
  52         // instead of just checking the 'output_buffering' setting.
  53         //
  54         if (PMA_PHP_INT_VERSION >= 40300 && @function_exists('ob_get_level')) {
  55             if (ob_get_level() > 0) {
  56                 $mode = 0;
  57             }
  58         }
  59
  60         // Zero (0) is no mode or in other words output buffering is OFF.
  61         // Follow 2^0, 2^1, 2^2, 2^3 type values for the modes.
  62         // Usefull if we ever decide to combine modes.  Then a bitmask field of
  63         // the sum of all modes will be the natural choice.
  64
  65         header('X-ob_mode: ' . $mode);
  66
  67         return $mode;
  68     } // end of the 'PMA_outBufferModeGet()' function
  69
  70
  71     /**
  72      * This function will need to run at the top of all pages if output
  73      * output buffering is turned on.  It also needs to be passed $mode from
  74      * the PMA_outBufferModeGet() function or it will be useless.
  75      *
  76      * @param   integer  the output buffer mode
  77      *
  78      * @return  boolean  whether output buffering is enabled or not
  79      */
  80     function PMA_outBufferPre($mode)
  81     {
  82         switch($mode)
  83         {
  84             case 1:
  85                 ob_start('ob_gzhandler');
  86                 $retval = TRUE;
  87                 break;
  88
  89             case 0:
  90                 $retval = FALSE;
  91                 break;
  92
  93             // loic1: php3 fix
  94             default:
  95                 $retval = FALSE;
  96                 break;
  97         } // end switch
  98
  99         return $retval;
 100     } // end of the 'PMA_outBufferPre()' function
 101
 102
 103     /**
 104      * This function will need to run at the bottom of all pages if output
 105      * buffering is turned on.  It also needs to be passed $mode from the
 106      * PMA_outBufferModeGet() function or it will be useless.
 107      *
 108      * @param   integer  the output buffer mode
 109      *
 110      * @return  boolean  whether data has been send from the buffer or not
 111      */
 112     function PMA_outBufferPost($mode)
 113     {
 114         switch($mode)
 115         {
 116             case 1:
 117                 # This output buffer doesn't need a footer.
 118                 $retval = TRUE;
 119                 break;
 120
 121             case 0:
 122                 $retval = FALSE;
 123                 break;
 124
 125             // loic1: php3 fix
 126             default:
 127                 $retval = FALSE;
 128                 break;
 129         } // end switch
 130
 131         return $retval;
 132     } // end of the 'PMA_outBufferPost()' function
 133
 134 } // $__PMA_OB_LIB__
 135
 136 ?>