/htdocs/phpmyadmin/libraries/ob.lib.php
PHP | 111 lines | 34 code | 13 blank | 64 comment | 10 complexity | ce4cf9d69f8dcd652981317c3538cf64 MD5 | raw file
Possible License(s): LGPL-2.1, Apache-2.0, LGPL-2.0, LGPL-3.0, MPL-2.0-no-copyleft-exception, GPL-2.0, BSD-3-Clause, GPL-3.0, BSD-2-Clause
- <?php
- /* vim: set expandtab sw=4 ts=4 sts=4: */
- /**
- * Output buffer functions for phpMyAdmin
- *
- * Copyright 2001 Jeremy Brand <jeremy@nirvani.net>
- * http://www.jeremybrand.com/Jeremy/Brand/Jeremy_Brand.html
- *
- * Check for all the needed functions for output buffering
- * Make some wrappers for the top and bottoms of our files.
- *
- * @version $Id$
- * @package phpMyAdmin
- */
- /**
- * This function be used eventually to support more modes. It is needed
- * because both header and footer functions must know what each other is
- * doing.
- *
- * @uses $cfg['OBGzip']
- * @uses function_exists()
- * @uses ini_get()
- * @uses ob_get_level()
- * @staticvar integer remember last calculated value
- * @return integer the output buffer mode
- */
- function PMA_outBufferModeGet()
- {
- static $mode = null;
- if (null !== $mode) {
- return $mode;
- }
- $mode = 0;
- if ($GLOBALS['cfg']['OBGzip'] && function_exists('ob_start')) {
- if (ini_get('output_handler') == 'ob_gzhandler') {
- // If a user sets the output_handler in php.ini to ob_gzhandler, then
- // any right frame file in phpMyAdmin will not be handled properly by
- // the browser. My fix was to check the ini file within the
- // PMA_outBufferModeGet() function.
- //
- // (Patch by Garth Gillespie, modified by Marc Delisle)
- $mode = 0;
- } elseif (function_exists('ob_get_level') && ob_get_level() > 0) {
- // If output buffering is enabled in php.ini it's not possible to
- // add the ob_gzhandler without a warning message from php 4.3.0.
- // Being better safe than sorry, check for any existing output handler
- // instead of just checking the 'output_buffering' setting.
- $mode = 0;
- } else {
- $mode = 1;
- }
- }
- // Zero (0) is no mode or in other words output buffering is OFF.
- // Follow 2^0, 2^1, 2^2, 2^3 type values for the modes.
- // Usefull if we ever decide to combine modes. Then a bitmask field of
- // the sum of all modes will be the natural choice.
- return $mode;
- } // end of the 'PMA_outBufferModeGet()' function
- /**
- * This function will need to run at the top of all pages if output
- * output buffering is turned on. It also needs to be passed $mode from
- * the PMA_outBufferModeGet() function or it will be useless.
- *
- * @uses PMA_outBufferModeGet()
- * @uses PMA_outBufferPost() to register it as shutdown function
- * @uses ob_start()
- * @uses header() to send X-ob_mode:
- * @uses register_shutdown_function() to register PMA_outBufferPost()
- */
- function PMA_outBufferPre()
- {
- if ($mode = PMA_outBufferModeGet()) {
- ob_start('ob_gzhandler');
- }
- header('X-ob_mode: ' . $mode);
- register_shutdown_function('PMA_outBufferPost');
- } // end of the 'PMA_outBufferPre()' function
- /**
- * This function will need to run at the bottom of all pages if output
- * buffering is turned on. It also needs to be passed $mode from the
- * PMA_outBufferModeGet() function or it will be useless.
- *
- * @uses PMA_outBufferModeGet()
- * @uses ob_flush()
- * @uses flush()
- */
- function PMA_outBufferPost()
- {
- if (ob_get_status() && PMA_outBufferModeGet()) {
- ob_flush();
- }
- /**
- * previously we had here an "else flush()" but some PHP versions
- * (at least PHP 5.2.11) have a bug (49816) that produces garbled
- * data
- */
- } // end of the 'PMA_outBufferPost()' function
- ?>