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HomeBackend DevelopmentPHP Tutorialclass_core.php 模块效能白皮书

class_core.php 模块功能白皮书

source/class/class_core.php 是 Discuz! 的通用初始化模块程序,其几乎被所有的外部代码所引用,在您开始插件设计之前,可以先对该模块的大致功能做一定的了解。class_core.php 主要完成了以下任务:

  • 对不同 PHP 及操作系统环境做了判断和兼容性处理,使得 Discuz! 可以运行于各种不同配置的服务器环境下。
  • 初始化常量 IN_DISCUZ 为 TRUE,用于 include 或 require 后续程序的判断,避免其他程序被非法引用。
  • 读取社区程序所在绝对路径,存放于常量 DISCUZ_ROOT 中。
  • 加载所需的基本函数库 source/function/function_core.php。
  • 通过 config/config_global.php 中提供的数据库账号信息,建立数据库连接。Discuz! 支持数据表的前缀,如需获得表的全名,可使用“DB::table('tablename')”方式。
  • 判断用户是否登录,如登录标记 $_G['uid'] 为非 0,同时将 $_G['username'](加了 addslashes 的用户名,可用于不加修改的插入数据库)、 $_G['member']['username'](原始的用户名,可用于页面显示)、$_G['member']['password'](用户密码的MD5串)等相应用户信息赋值,其他用户信息存放于 $_G['member'],更多信息可通过“getuserprofile()”获取。
  • 判断用户管理权限,将管理权限标记 $_G['adminid'] 为 1~3 中间的值。0 代表普通用户;1 代表论坛管理员;2 代表超级版主;3 代表论坛版主。 将用户权限按照其所在的主用户组 ID 标记为 $_G['groupid'],相关权限从该 $_G['groupid'] 所对应的系统缓存中读出,存放于 $_G['group']。
  • 预置读入了每个模块的各种设置变量。
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