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PHP获取当期前运行文件的路径,名字,服务器路径

echo "显示脚本文件的相对路径和文件名:\"".$_SERVER["PHP_SELF"]."\"
";
echo "显示服务器使用的CGI脚本规范:\"".$_SERVER["GATEWAY_INTERFACE"]."\"
";
echo "显示当前运行脚本所在服务器的IP地址:\"".$_SERVER["SERVER_ADDR"]."\"
";
echo "显示当前运行脚本服务器名称:\"".$_SERVER["SERVER_NAME"]."\"
";
echo "显示当前运行脚本服务器标识:\"".$_SERVER["SERVER_SOFTWARE"]."\"
";
echo "显示请求页面的通信协议的名称和版本:\"".$_SERVER["SERVER_PROTOCOL"]."\"
";
echo "显示访问页面的请求方法:\"".$_SERVER["REQUEST_METHOD"]."\"
";
echo "显示脚本开始运行时间:\"".$_SERVER["REQUEST_TIME"]."\"
";
echo "显示URL问号后的字符串:\"".$_SERVER["QUERY_STRING"]."\"
";
echo "显示当前运行脚本的文档根目录:\"".$_SERVER["DOCUMENT_ROOT"]."\"
";
echo "显示当前Accept请求的头信息:\"".$_SERVER["HTTP_ACCEPT"]."\"
";
echo "显示当前请求的字符信息:\"".$_SERVER["HTTP_ACCEPT_CHARSET"]."\"
";
echo "显示当前当前请求的Accept-Encoding头信息:\"".$_SERVER["HTTP_ACCEPT_ENCODING"]."\"
";
echo "显示当前请求的Accept-Language头信息:\"".$_SERVER["HTTP_ACCEPT_LANGUAGE"]."\"
";
echo "显示当前请求的Connection头信息:\"".$_SERVER["HTTP_CONNECTION"]."\"
";
echo "显示当前请求的Host头信息:\"".$_SERVER["HTTP_HOST"]."\"
";
echo "显示当前页面的前一个页面的URL地址:\"".$_SERVER["HTTP_REFERER"]."\"
";
echo "显示当前请求的User-Agent的头信息:\"".$_SERVER["HTTP_USER_AGENT"]."\"
";
echo "显示脚本是否可以通过HTTPS协议进行访问:\"".$_SERVER["HTTPS"]."\"
";
echo "显示浏览当前页面用户的IP地址:\"".$_SERVER["REMOTE_ADDR"]."\"
";
echo "显示浏览当前页面用户的主机名:\"".$_SERVER["REMOTE_HOST"]."\"
";
echo "显示用户连接到服务器时所使用的端口:\"".$_SERVER["REMOTE_PORT"]."\"
";
echo "显示当前执行脚本的绝对路径名:\"".$_SERVER["SCRIPT_FILENAME"]."\"
";
echo "显示Apache配置文件中的SERVER_ADMIN参数设置情况:\"".$_SERVER["SERVER_ADMIN"]."\"
";
echo "显示网络服务器使用的端口,默认为\"80\":\"".$_SERVER["SERVER_PORT"]."\"
";
echo "显示服务器版本和虚拟主机名的字符串:\"".$_SERVER["SERVER_SIGNATURE"]."\"
";
echo "显示脚本在文件系统中的基本路径:\"".$_SERVER["PATH_TRANSLATED"]."\"
";
echo "显示当前脚本的路径:\"".$_SERVER["SCRIPT_NAME"]."\"
";
echo "显示访问当前页面的URI:\"".$_SERVER["REQUEST_URI"]."\"
";
?>

注:?在 PHP 4.1.0 及以后版本使用。之前的版本,使用?$HTTP_SERVER_VARS

$_SERVER?是一个包含诸如头信息(header)、路径(path)和脚本位置(script locations)的数组。数组的实体由 web 服务器创建。不能保证所有的服务器都能产生所有的信息;服务器可能忽略了一些信息,或者产生了一些未在下面列出的新的信息。这意味着,大量的这些变量在 CGI 1.1 规范中说明,所以应该仔细研究一下。

这是一个“superglobal”,或者可以描述为自动全局变量。这只不过意味这它在所有的脚本中都有效。在函数或方法中不需要使用?global $_SERVER;?访问它,就如同使用?$HTTP_SERVER_VARS?一样。

$HTTP_SERVER_VARS?包含着同样的信息,但是不是一个自动全局变量(注意:$HTTP_SERVER_VARS?和$_SERVER?是不同的变量,PHP 处理它们的方式不同)。

如果设置了 register_globals 指令,这些变量也在所有脚本中可用;也就是,分离了?$_SERVER?和$HTTP_SERVER_VARS?数组。相关信息,请参阅安全的相关章节使用 Register Globals。这些单独的全局变量不是自动全局变量。

或许会发现下面列出的某些 $_SERVER 元素并不可用。注意,如果以命令行方式运行 PHP,下面列出的元素几乎没有有效的(或是没有任何实际意义的)。

?

?

PHP_SELF

当前正在执行脚本的文件名,与 document root 相关。举例来说,在 URL 地址为http://example.com/test.php/foo.bar?的脚本中使用?$_SERVER['PHP_SELF']?将会得到/test.php/foo.bar?这个结果。__FILE__ 常量包含当前(例如包含)文件的绝对路径和文件名。

如果 PHP 以命令行方式运行,该变量在 PHP 4.3.0 之前无效。

argv

传递给该脚本的参数。当脚本运行在命令行方式时,argv 变量传递给程序 C 语言样式的命令行参数。当调用 GET 方法时,该变量包含请求的数据。

argc

包含传递给程序的命令行参数的个数(如果运行在命令行模式)。

GATEWAY_INTERFACE

服务器使用的 CGI 规范的版本。例如,“CGI/1.1”。

SERVER_NAME

当前运行脚本所在服务器主机的名称。如果该脚本运行在一个虚拟主机上,该名称是由那个虚拟主机所设置的值决定。

SERVER_SOFTWARE

服务器标识的字串,在响应请求时的头信息中给出。

SERVER_PROTOCOL

请求页面时通信协议的名称和版本。例如,“HTTP/1.0”。

REQUEST_METHOD

访问页面时的请求方法。例如:“GET”、“HEAD”,“POST”,“PUT”。

注:?如果请求的方式是?HEAD,PHP 脚本将在送出头信息后中止(这意味着在产生任何输出后,不再有输出缓冲)。

REQUEST_TIME

请求开始时的时间戳。从 PHP 5.1.0 起有效。

QUERY_STRING

查询(query)的字符串(URL 中第一个问号 ? 之后的内容)。

DOCUMENT_ROOT

当前运行脚本所在的文档根目录。在服务器配置文件中定义。

HTTP_ACCEPT

当前请求的?Accept:?头信息的内容。

HTTP_ACCEPT_CHARSET

当前请求的?Accept-Charset:?头信息的内容。例如:“iso-8859-1,*,utf-8”。

HTTP_ACCEPT_ENCODING

当前请求的?Accept-Encoding:?头信息的内容。例如:“gzip”。

HTTP_ACCEPT_LANGUAGE

当前请求的?Accept-Language:?头信息的内容。例如:“en”。

HTTP_CONNECTION

当前请求的?Connection:?头信息的内容。例如:“Keep-Alive”。

HTTP_HOST

当前请求的?Host:?头信息的内容。

HTTP_REFERER

链接到当前页面的前一页面的 URL 地址。不是所有的用户代理(浏览器)都会设置这个变量,而且有的还可以手工修改?HTTP_REFERER。因此,这个变量不总是真实正确的。

HTTP_USER_AGENT

当前请求的?User-Agent:?头信息的内容。该字符串表明了访问该页面的用户代理的信息。一个典型的例子是:Mozilla/4.5 [en] (X11; U; Linux 2.2.9 i586)。也可以使用?get_browser()?得到此信息。

HTTPS

如果脚本是通过 HTTPS 协议被访问,则被设为一个非空的值。

REMOTE_ADDR

正在浏览当前页面用户的 IP 地址。

REMOTE_HOST

正在浏览当前页面用户的主机名。反向域名解析基于该用户的?REMOTE_ADDR

注:?必须配置 Web 服务器来建立此变量。例如 Apache 需要在?httpd.conf?中有HostnameLookups On。参见?gethostbyaddr()

REMOTE_PORT

用户连接到服务器时所使用的端口。

SCRIPT_FILENAME

当前执行脚本的绝对路径名。

注:?如果脚本在 CLI 中被执行,作为相对路径,例如?file.php?或../file.php$_SERVER['SCRIPT_FILENAME']?将包含用户指定的相对路径。

?

SERVER_ADMIN

该值指明了 Apache 服务器配置文件中的 SERVER_ADMIN 参数。如果脚本运行在一个虚拟主机上,则该值是那个虚拟主机的值。

SERVER_PORT

服务器所使用的端口。默认为“80”。如果使用 SSL 安全连接,则这个值为用户设置的 HTTP 端口。

SERVER_SIGNATURE

包含服务器版本和虚拟主机名的字符串。

PATH_TRANSLATED

当前脚本所在文件系统(不是文档根目录)的基本路径。这是在服务器进行虚拟到真实路径的映像后的结果。

注:?PHP 4.3.2 之后,PATH_TRANSLATED?在 Apache 2?SAPI?模式下不再和 Apache 1 一样隐含赋值,而是若 Apache 不生成此值,PHP 便自己生成并将其值放入?SCRIPT_FILENAME?服务器常量中。这个修改遵守了?CGI?规范,PATH_TRANSLATED?仅在?PATH_INFO?被定义的条件下才存在。

Apache 2 用户可以使用?httpd.conf?中的?AcceptPathInfo On?来定义?PATH_INFO

SCRIPT_NAME

包含当前脚本的路径。这在页面需要指向自己时非常有用。__FILE__ 包含当前文件的绝对路径和文件名(例如包含文件)。

REQUEST_URI

访问此页面所需的 URI。例如,“/index.html”。

PHP_AUTH_DIGEST

当作为 Apache 模块运行时,进行 HTTP Digest 认证的过程中,此变量被设置成客户端发送的“Authorization”HTTP 头内容(以便作进一步的认证操作)。

PHP_AUTH_USER

当 PHP 运行在 Apache 或 IIS(PHP 5 是 ISAPI)模块方式下,并且正在使用 HTTP 认证功能,这个变量便是用户输入的用户名。

PHP_AUTH_PW

当 PHP 运行在 Apache 或 IIS(PHP 5 是 ISAPI)模块方式下,并且正在使用 HTTP 认证功能,这个变量便是用户输入的密码。

AUTH_TYPE

当 PHP 运行在 Apache 模块方式下,并且正在使用 HTTP 认证功能,这个变量便是认证的类型。

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