PHP's $

$_server[' php_self '] #当前正在执行脚本的文件名, associated with document root.
$_server[' argv '] #传递给该脚本的参数.
$_server[' argc '] #包含传递给程序的命令行参数的个数 (if run in command line mode).
$_server[' Gateway_interface '] #服务器使用的 the version of the CGI specification. For example, "cgi/1.1".
$_server[' server_name '] #当前运行脚本所在服务器主机的名称.
$_server[' Server_software '] #服务器标识的字串, given in response to the request in the head.
$_server[' Server_protocol '] #请求页面时通信协议的名称和版本. For example, "http/1.0".
$_server[' Request_method '] #访问页面时的请求方法. For example:, POST and put.
String for $_server[' query_string '] #查询 (QUERY).
$_server[' Document_root '] #当前运行脚本所在的文档根目录. Defined in the server configuration file.
$_server[' http_accept '] #当前请求的 ACCEPT: The contents of the head.
$_server[' Http_accept_charset '] #当前请求的 Accept-charset: The contents of the head. For example: "Iso-8859-1,*,utf-8".
$_server[' http_accept_encoding '] #当前请求的 accept-encoding: The contents of the head. For example: "gzip".
$_server[' http_accept_language '] #当前请求的 accept-language: The contents of the head. For example: "en".
$_server[' http_connection '] #当前请求的 CONNECTION: The contents of the head. For example: "Keep-alive".
$_server[' Http_host '] #当前请求的 HOST: The contents of the head.
$_server[' Http_referer '] #链接到当前页面的前一页面的 URL address.
$_server[' http_user_agent '] #当前请求的 user_agent: The contents of the head.
$_server[' https ']-if accessed through HTTPS, is set to a Non-empty value (on), otherwise it is returned off
$_server[' REMOTE_ADDR '] #正在浏览当前页面用户的 IP address.
$_server[' Remote_host '] #正在浏览当前页面用户的主机名.
$_server[' Remote_port '] #用户连接到服务器时所使用的端口.
$_server[' Script_filename '] #当前执行脚本的绝对路径名.
$_server[' Server_admin '] #管理员信息
$_server[' Server_port '] #服务器所使用的端口
$_server[' Server_signature '] #包含服务器版本和虚拟主机名的字符串.
$_server[' path_translated '] #当前脚本所在文件系统 (not the document root directory) the basic path.
$_server[' Script_name '] #包含当前脚本的路径. This is useful when the page needs to point to itself.
$_server[' Request_uri '] #访问此页面所需的 URI. For example, "/index.html".
$_server[' Php_auth_user '] #当 PHP runs in the Apache module mode and is using the HTTP authentication feature, which is the user name entered by the user.
$_server[' PHP_AUTH_PW '] #当 PHP runs in the Apache module mode and is using the HTTP authentication function, which is the user input password.
$_server[' Auth_type '] #当 PHP runs in the Apache module mode and is using the HTTP authentication feature, which is the type of authentication.