View file includes/startup.php

<?php
/**
*
* @package phpBB3
* @copyright (c) 2011 phpBB Group
* @license http://opensource.org/licenses/gpl-license.php GNU Public License
*
*/

/**
*/
if (!defined('IN_PHPBB'))
{
	exit;
}

// Report all errors, except notices and deprecation messages
if (!defined('E_DEPRECATED'))
{
	define('E_DEPRECATED', 8192);
}
$level = E_ALL & ~E_NOTICE & ~E_DEPRECATED;
if (version_compare(PHP_VERSION, '5.4.0-dev', '>='))
{
	// PHP 5.4 adds E_STRICT to E_ALL.
	// Our utf8 normalizer triggers E_STRICT output on PHP 5.4.
	// Unfortunately it cannot be made E_STRICT-clean while
	// continuing to work on PHP 4.
	// Therefore, in phpBB 3.0.x we disable E_STRICT on PHP 5.4+,
	// while phpBB 3.1 will fix utf8 normalizer.
	// E_STRICT is defined starting with PHP 5
	if (!defined('E_STRICT'))
	{
		define('E_STRICT', 2048);
	}
	$level &= ~E_STRICT;
}
error_reporting($level);

/*
* Remove variables created by register_globals from the global scope
* Thanks to Matt Kavanagh
*/
function deregister_globals()
{
	$not_unset = array(
		'GLOBALS'	=> true,
		'_GET'		=> true,
		'_POST'		=> true,
		'_COOKIE'	=> true,
		'_REQUEST'	=> true,
		'_SERVER'	=> true,
		'_SESSION'	=> true,
		'_ENV'		=> true,
		'_FILES'	=> true,
		'phpEx'		=> true,
		'phpbb_root_path'	=> true
	);

	// Not only will array_merge and array_keys give a warning if
	// a parameter is not an array, array_merge will actually fail.
	// So we check if _SESSION has been initialised.
	if (!isset($_SESSION) || !is_array($_SESSION))
	{
		$_SESSION = array();
	}

	// Merge all into one extremely huge array; unset this later
	$input = array_merge(
		array_keys($_GET),
		array_keys($_POST),
		array_keys($_COOKIE),
		array_keys($_SERVER),
		array_keys($_SESSION),
		array_keys($_ENV),
		array_keys($_FILES)
	);

	foreach ($input as $varname)
	{
		if (isset($not_unset[$varname]))
		{
			// Hacking attempt. No point in continuing unless it's a COOKIE (so a cookie called GLOBALS doesn't lock users out completely)
			if ($varname !== 'GLOBALS' || isset($_GET['GLOBALS']) || isset($_POST['GLOBALS']) || isset($_SERVER['GLOBALS']) || isset($_SESSION['GLOBALS']) || isset($_ENV['GLOBALS']) || isset($_FILES['GLOBALS']))
			{
				exit;
			}
			else
			{
				$cookie = &$_COOKIE;
				while (isset($cookie['GLOBALS']))
				{
					if (!is_array($cookie['GLOBALS']))
					{
						break;
					}

					foreach ($cookie['GLOBALS'] as $registered_var => $value)
					{
						if (!isset($not_unset[$registered_var]))
						{
							unset($GLOBALS[$registered_var]);
						}
					}
					$cookie = &$cookie['GLOBALS'];
				}
			}
		}

		unset($GLOBALS[$varname]);
	}

	unset($input);
}

// Register globals and magic quotes have been dropped in PHP 5.4
if (version_compare(PHP_VERSION, '5.4.0-dev', '>='))
{
	/**
	* @ignore
	*/
	define('STRIP', false);
}
else
{
	@set_magic_quotes_runtime(0);

	// Be paranoid with passed vars
	if (@ini_get('register_globals') == '1' || strtolower(@ini_get('register_globals')) == 'on' || !function_exists('ini_get'))
	{
		deregister_globals();
	}

	define('STRIP', (get_magic_quotes_gpc()) ? true : false);
}

// Prevent date/time functions from throwing E_WARNING on PHP 5.3 by setting a default timezone
if (function_exists('date_default_timezone_set') && function_exists('date_default_timezone_get'))
{
	// For PHP 5.1.0 the date/time functions have been rewritten
	// and setting a timezone is required prior to calling any date/time function.

	// Since PHP 5.2.0 calls to date/time functions without having a timezone set
	// result in E_STRICT errors being thrown.
	// Note: We already exclude E_STRICT errors
	// (to be exact: they are not included in E_ALL in PHP 5.2)

	// In PHP 5.3.0 the error level has been raised to E_WARNING which causes problems
	// because we show E_WARNING errors and do not set a default timezone.
	// This is because we have our own timezone handling and work in UTC only anyway.

	// So what we basically want to do is set our timezone to UTC,
	// but we don't know what other scripts (such as bridges) are involved,
	// so we check whether a timezone is already set by calling date_default_timezone_get().

	// Unfortunately, date_default_timezone_get() itself might throw E_WARNING
	// if no timezone has been set, so we have to keep it quiet with @.

	// date_default_timezone_get() tries to guess the correct timezone first
	// and then falls back to UTC when everything fails.
	// We just set the timezone to whatever date_default_timezone_get() returns.
	date_default_timezone_set(@date_default_timezone_get());
}

$starttime = explode(' ', microtime());
$starttime = $starttime[1] + $starttime[0];