$_SERVER
HTTP_HOST : localhost //當前請求頭中 Host: 項的內容 HTTP_CONNECTION : keep-alive HTTP_CACHE_CONTROL : max-age=0 HTTP_ACCEPT : text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8 HTTP_USER_AGENT : Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/28.0.1500.95 Safari/537.36 SE 2.X MetaSr 1.0 HTTP_ACCEPT_ENCODING : gzip,deflate,sdch HTTP_ACCEPT_LANGUAGE : zh-CN,zh;q=0.8 HTTP_COOKIE : PHPSESSID=h17l0sic2kappj6fv19q69rj46 PATH : C:\Program Files (x86)\AMD APP\bin\x86_64;C:\Program Files (x86)\AMD APP\bin\x86;C:\Windows\system32;C:\Windows;C:\Windows\System32\Wbem;C:\Windows\System32\WindowsPowerShell\v1.0\;C:\Program Files (x86)\ATI Technologies\ATI.ACE\Core-Static; SystemRoot : C:\Windows COMSPEC : C:\Windows\system32\cmd.exe PATHEXT : .COM;.EXE;.BAT;.CMD;.VBS;.VBE;.JS;.JSE;.WSF;.WSH;.MSC WINDIR : C:\Windows SERVER_SIGNATURE : SERVER_SOFTWARE : Apache/2.4.4 (Win64) PHP/5.4.12 SERVER_NAME : localhost //當前運行腳本所在的服務器的主機名。 SERVER_ADDR : 127.0.0.1 //當前運行腳本所在的服務器的 IP 地址。 SERVER_PORT : 80 REMOTE_ADDR : 127.0.0.1 DOCUMENT_ROOT : D:/wamp/www REQUEST_SCHEME : http CONTEXT_PREFIX : CONTEXT_DOCUMENT_ROOT : D:/wamp/www SERVER_ADMIN : [email protected] SCRIPT_FILENAME : D:/wamp/www/php.php REMOTE_PORT : 59329 GATEWAY_INTERFACE : CGI/1.1 SERVER_PROTOCOL : HTTP/1.1 REQUEST_METHOD : GET QUERY_STRING : REQUEST_URI : /php.php SCRIPT_NAME : /php.php PHP_SELF : /php.php //當前執行腳本的文件名 REQUEST_TIME_FLOAT : 1411546941.967 REQUEST_TIME : 1411546941
$_ENV 獲取環境變量 瞭解即可.
$GLOBAL 包括$_SERVER $_ENV $_GET $_POST $_FILE $_COOKIE $_SESSION的數據