用 getenv函数进行处理：
<?<span php
</span><span $root</span> = <span getenv</span>('DOCUMENT_ROOT'); <span //</span><span //服务器文档根目录</span>
<span $port</span> = <span getenv</span>('SERVER_PORT'); <span //</span><span //服务器端口</span>
<span $file</span> = <span getenv</span>('SCRIPT_NAME'); <span //</span><span //当前执行文件</span>
<span $ua</span> = <span getenv</span>('HTTP_USER_AGENT'); <span //</span><span //用户UA</span>
<span $method</span> = <span getenv</span>('REQUEST_METHOD'); <span //</span><span //请求方法</span>
<span $protocol</span> = <span getenv</span>('SERVER_PROTOCOL'); <span //</span><span //传输协议</span>
<span getmypid</span>()， <span //</span><span //返回当前PHP进程的进程ID号，该函数不需要输入参数。</span>
<span get_current_user</span>()， <span //</span><span //返回当前程序的所有者名称，该函数也不需要输入参数。</span>
?>示例：
<?<span php
</span><span /*</span><span *
* php获取系统信息
* by www.jbxue.com
</span><span */</span><span
获取系统类型及版本号： </span><span php_uname</span>() (例：Windows NT COMPUTER 5.1 build 2600<span )
只获取系统类型： </span><span php_uname</span>('s') (或：<span PHP_OS</span><span ，例：Windows NT)
只获取系统版本号： </span><span php_uname</span>('r') (例：5.1<span )
获取PHP运行方式： </span><span php_sapi_name</span><span () (PHP run mode：apache2handler)
获取前进程用户名： </span><span Get_Current_User</span><span ()
获取PHP版本： </span><span PHP_VERSION</span><span
获取Zend版本： </span><span Zend_Version</span><span ()
获取PHP安装路径： </span><span DEFAULT_INCLUDE_PATH</span><span
获取当前文件绝对路径： </span><span __FILE__</span><span
获取Http请求中Host值： </span><span $_SERVER</span>["HTTP_HOST"<span ] (返回值为域名或IP)
获取服务器IP： </span><span GetHostByName</span>(<span $_SERVER</span>['SERVER_NAME'<span ])
接受请求的服务器IP： </span><span $_SERVER</span>["SERVER_ADDR"] (有时候获取不到，推荐用：<span GetHostByName</span>(<span $_SERVER</span>['SERVER_NAME'<span ]))
获取客户端IP： </span><span $_SERVER</span>['REMOTE_ADDR'<span ]
获取服务器解译引擎： </span><span $_SERVER</span>['SERVER_SOFTWARE'<span ]
获取服务器CPU数量： </span><span $_SERVER</span>['PROCESSOR_IDENTIFIER'<span ]
获取服务器系统目录： </span><span $_SERVER</span>['SystemRoot'<span ]
获取服务器域名： </span><span $_SERVER</span>['SERVER_NAME'] (建议使用：<span $_SERVER</span>["HTTP_HOST"<span ])
获取用户域名： </span><span $_SERVER</span>['USERDOMAIN'<span ]
获取服务器语言： </span><span $_SERVER</span>['HTTP_ACCEPT_LANGUAGE'<span ]
获取服务器Web端口： </span><span $_SERVER</span>['SERVER_PORT'<span ]
</span>?>
