discuz X2 源代码分析—-index.php
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1.<?php 2. 3./** 4.* [Discuz!] (C)2001-2099 Comsenz Inc. 5.* This is NOT a freeware, use is subject to license terms 6.* 7.* $Id: index.php 10420 2010-05-11 06:58:24Z zhaoxiongfei $ 8.*/ 9.//====加载全局配置==== 10. 11.@include './config/config_global.php'; 12.//====如果全局配置为空则说明系统尚未安装==== 13.14.//====进一步检测是否存在install.lock文件,不存在则转向到install文件夹路径下的文件,存在则说明配置信息丢失==== 15. 16.if(empty($_config)) { 17. if(!file_exists('./data/install.lock')) { 18. header('location: install'); 19. exit; 20. } else { 21. error('config_notfound'); 22. } 23.} 24.//====当前app名称==== 25.$_t_curapp = ''; 26.//====判断app绑定的域名==== 27.foreach($_config['app']['domain'] as $_t_app => $_t_domain) { 28. if($_t_domain == $_SERVER['HTTP_HOST']) { 29. $_t_curapp = $_t_app; 30. break; 31. } 32.} 33.//====如果当前app名称为空或为default,则进一步判断配置信息,设置app名称为默认或forum==== 34.if(empty($_t_curapp) || $_t_curapp == 'default') { 35. $_t_curapp = !empty($_config['app']['default']) ? $_config['app']['default'] : 'forum'; 36.} 37.//====重写$_SERVER['PHP_SELF']系统变量==== 38.$_SERVER['PHP_SELF'] = str_replace('index.php', $_t_curapp.'.php', $_SERVER['PHP_SELF']); 39.//====判断请求字符串是否为空,不为空则重写$_GET变量,指定系统下一步执行的方法和参数 40.if(!empty($_SERVER['QUERY_STRING'])) { 41. //====如果请求字符串为数字类型,则app名称为Home,调用spaceMOD,请求字符串作为uid传入==== 42. if(is_numeric($_SERVER['QUERY_STRING'])) { 43. $_t_curapp = 'home'; 44. $_GET = array('mod'=>'space', 'uid'=>$_SERVER['QUERY_STRING']); 45. //====如果请求字符串第一个字符为g且g之后的字符为数字则app名称为forum,调用groupMOD,请求字符串数字部分作为fid传入==== 46. //====经过测试,请求url形如index.php?g56==== 47. } elseif(strtolower($_SERVER['QUERY_STRING']{0}) == 'g' && is_numeric(substr($_SERVER['QUERY_STRING'], 1))) { 48. $_t_curapp = 'forum'; 49. $_GET = array('mod'=>'group', 'fid'=>intval(substr($_SERVER['QUERY_STRING'], 1))); 50. //====原理同上==== 51. } elseif(strtolower($_SERVER['QUERY_STRING']{0}) == 'f' && is_numeric(substr($_SERVER['QUERY_STRING'], 1))) { 52. $_t_curapp = 'forum'; 53. $_GET = array('mod'=>'forumdisplay', 'fid'=>intval(substr($_SERVER['QUERY_STRING'], 1))); 54. //====原理同上==== 55. } elseif(strtolower($_SERVER['QUERY_STRING']{0}) == 't' && is_numeric(substr($_SERVER['QUERY_STRING'], 1))) { 56. $_t_curapp = 'forum'; 57. $_GET = array('mod'=>'viewthread', 'tid'=>intval(substr($_SERVER['QUERY_STRING'], 1))); 58. } 59.} else { 60. //====如果请求字符串为空===== 61. //====判断个人空间是否启用二级域名及二级域名的根域名,若启用则解析二级域名指向实际对应的homeAPP,调用spaceMOD==== 62. if(!empty($_config['home']['allowdomain']) && !empty($_config['home']['domainroot'])) { 63. $_t_hosts = explode('.', $_SERVER['HTTP_HOST']); 64. $_t_domainroots = explode('.', $_config['home']['domainroot']); 65. $_t_domains = array_diff($_t_hosts, $_t_domainroots); 66. if($_t_domains && count($_t_domains) == 1) { 67. $_t_domain = array_shift($_t_domains); 68. $_t_holddomains = empty($_config['home']['holddomain'])?array():explode(',', $_config['home']['holddomain']); 69. if($_t_domain != 'www' && !in_array($_t_domain, $_t_holddomains)) { 70. $_t_curapp = 'home'; 71. $_GET = array('mod'=>'space', 'domain'=>$_t_domain); 72. } 73. } 74. } 75.} 76.//====根据之前获得的app名称调用具体的app文件==== 77.require './'.$_t_curapp.'.php'; 78. 79.?> |
