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CMS中PHP判断系统是否已经安装的方法示例

Jun 13, 2016 am 09:27 AM
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CMS中PHP判断系统是否已经安装的方法示例

 这篇文章主要介绍了CMS中PHP判断系统是否已经安装的方法示例,需要的朋友可以参考下

 

 

 

当今很多常用的CMS系统都带有安装程序,为了用户的使用方便,新下载的系统在使用前,都会判断该CMS系统是否已经安装过,若安装了则就给出提示,不需要重复安装,若未安装则进入安装界面,指导用户按步骤顺利安装CMS,那么基于PHP环境的CMS到底是如何用代码来实现这种判断机制呢?下面通过一个实例代码加以说明:

<?php
define("PHPOK_SET",true);
define("APP_ID","www");
//定义应用的根目录!(这个不是系统的根目录)本程序将应用目录限制在独立应用下
define("ROOT",str_replace("\\","/",dirname(__FILE__))."/");
//如果程序出程,请将ROOT改为下面这一行
//define("ROOT","./");
//定义框架
define("FRAMEWORK",ROOT."framework/");
//检测是否已安装,如未安装跳转到安装页面
//建议您在安装成功后去除这个判断。
if(!is_file(ROOT."data/install.lock"))//这个文件是当系统安装完成后会生成,特用来判断是否安装过
{
 header("Location:install/index.php");
 exit;
}
?>

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