$_SERVER

$_SERVER 是一个包含了诸如头信息(header)、路径(path)、以及脚本位置(script locations)等等信息的数组。这个数组中的项目由 Web 服务器创建。不能保证每个服务器都提供全部项目；服务器可能会忽略一些，或者提供一些没有在这里列举出来的项目。

echo "<pre>";
print_r($_SERVER);
echo "</pre>";

Array
(
    [PATH] => D:\apps\vmware\bin\;C:\Windows\system32;C:\Windows;C:\Windows\System32\Wbem;C:\Windows\System32\WindowsPowerShell\v1.0\;C:\Windows\System32\OpenSSH\;C:\Program Files\NVIDIA Corporation\NVIDIA NvDLISR;D:\apps\pycSafefile\x64;C:\Program Files (x86)\NVIDIA Corporation\PhysX\Common;D:\phpstudy_pro\Extensions\php\php7.3.4nts;C:\Program Files\Git\cmd;D:\node\;D:\apps\Redis-x64-5.0.10;C:\ProgramData\ComposerSetup\bin;D:\apps\go\bin;D:\apps\jdk-16.0.1\bin;;C:\WINDOWS\system32;C:\WINDOWS;C:\WINDOWS\System32\Wbem;C:\WINDOWS\System32\WindowsPowerShell\v1.0\;C:\WINDOWS\System32\OpenSSH\;D:\apps\python\Scripts\;D:\apps\python\;C:\Users\ZX_Ding\AppData\Local\Microsoft\WindowsApps;C:\Program Files\Bandizip\;C:\Users\ZX_Ding\AppData\Roaming\npm;C:\Users\ZX_Ding\go\bin;D:\apps\Microsoft VS Code\bin
    [SYSTEMROOT] => C:\WINDOWS
    [COMSPEC] => C:\WINDOWS\system32\cmd.exe
    [PATHEXT] => .COM;.EXE;.BAT;.CMD;.VBS;.VBE;.JS;.JSE;.WSF;.WSH;.MSC
    [WINDIR] => C:\WINDOWS
    [PHPRC] => D:/phpstudy_pro/Extensions/php/php7.3.4nts
    [_FCGI_SHUTDOWN_EVENT_] => 8868
    [SCRIPT_NAME] => /24/04/server.php
    [REQUEST_URI] => /24/04/server.php
    [QUERY_STRING] => 
    [REQUEST_METHOD] => GET
    [SERVER_PROTOCOL] => HTTP/1.1
    [GATEWAY_INTERFACE] => CGI/1.1
    [REMOTE_PORT] => 1095
    [SCRIPT_FILENAME] => D:/phpstudy_pro/WWW/24/04/server.php
    [SERVER_ADMIN] => admin@example.com
    [CONTEXT_DOCUMENT_ROOT] => D:/phpstudy_pro/WWW
    [CONTEXT_PREFIX] => 
    [REQUEST_SCHEME] => http
    [DOCUMENT_ROOT] => D:/phpstudy_pro/WWW
    [REMOTE_ADDR] => ::1
    [SERVER_PORT] => 80
    [SERVER_ADDR] => ::1
    [SERVER_NAME] => localhost
    [SERVER_SOFTWARE] => Apache/2.4.39 (Win64) OpenSSL/1.1.1b mod_fcgid/2.3.9a mod_log_rotate/1.02
    [SERVER_SIGNATURE] => 
    [SystemRoot] => C:\WINDOWS
    [HTTP_ACCEPT_LANGUAGE] => zh-CN,zh;q=0.9
    [HTTP_ACCEPT_ENCODING] => gzip, deflate, br
    [HTTP_SEC_FETCH_DEST] => document
    [HTTP_SEC_FETCH_USER] => ?1
    [HTTP_SEC_FETCH_MODE] => navigate
    [HTTP_SEC_FETCH_SITE] => none
    [HTTP_ACCEPT] => text/html,application/xhtml+xml,application/xml;q=0.9,image/avif,image/webp,image/apng,*/*;q=0.8,application/signed-exchange;v=b3;q=0.9
    [HTTP_USER_AGENT] => Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/96.0.4664.45 Safari/537.36
    [HTTP_UPGRADE_INSECURE_REQUESTS] => 1
    [HTTP_SEC_CH_UA_PLATFORM] => "Windows"
    [HTTP_SEC_CH_UA_MOBILE] => ?0
    [HTTP_SEC_CH_UA] => " Not A;Brand";v="99", "Chromium";v="96", "Google Chrome";v="96"
    [HTTP_CONNECTION] => close
    [HTTP_HOST] => localhost
    [FCGI_ROLE] => RESPONDER
    [PHP_SELF] => /24/04/server.php
    [REQUEST_TIME_FLOAT] => 1638351453.4439
    [REQUEST_TIME] => 1638351453
)