piwik学习1（index.php)

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//调用bootstrap.php 与 <span style="font-family: Arial, Helvetica, sans-serif;">dispatch.php文件</span>

<span style="font-family:Arial, Helvetica, sans-serif;">//预定义以下变量：</span><pre name="code" class="php">PIWIK_DOCUMENT_ROOT //主文件所在目录<pre name="code" class="php">PIWIK_INCLUDE_PATH  //依赖文件所目录<pre name="code" class="php">PIWIK_PRINT_ERROR_BACKTRACE //错误信息目录

<?php/** * Piwik - free/libre analytics platform * * @link http://piwik.org * @license http://www.gnu.org/licenses/gpl-3.0.html GPL v3 or later * * @package Piwik */if (!defined('PIWIK_DOCUMENT_ROOT')) { //利用define定义变量    define('PIWIK_DOCUMENT_ROOT', dirname(__FILE__) == '/' ? '' : dirname(__FILE__));}if (file_exists(PIWIK_DOCUMENT_ROOT . '/bootstrap.php')) { //?    require_once PIWIK_DOCUMENT_ROOT . '/bootstrap.php';}if (!defined('PIWIK_INCLUDE_PATH')) { //定义includePath    define('PIWIK_INCLUDE_PATH', PIWIK_DOCUMENT_ROOT);}require_once PIWIK_INCLUDE_PATH . '/core/bootstrap.php'; //加载bootstrap 疑问:为何在根目录中调用同名文件，如果避免两个文件调用的冲突if (!defined('PIWIK_PRINT_ERROR_BACKTRACE')) {    define('PIWIK_PRINT_ERROR_BACKTRACE', false);}require_once PIWIK_INCLUDE_PATH . '/core/dispatch.php';

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