In-depth analysis of php server variables $ _ SERVER

For a new contact1. $ _ SESSION ['php _ SELF '] -- php server variable $ _ SERVER gets the file name of the currently executing script

2. $ _ SERVER ['server _ Protocol'] -- name and version of the communication PROTOCOL when requesting the page. For example, "HTTP/1.0 ".

3. $ _ SERVER ['request _ time'] -- the timestamp at the start of the REQUEST. Valid from PHP 5.1.0. The same effect as the time function.

4. $ _ SERVER ['argv'] -- parameters passed to the script. I tried the get method to get $ _ SERVER ['argv'] [0]. The post method cannot assign a value to him.

5. $ _ SERVER ['server _ name'] -- returns the current host NAME.

6. $ _ SERVER ['server _ soft'] -- the string of the SERVER identifier, which is provided in the header information in the Response Request. For example, Microsoft-IIS/6.0

7. $ _ SERVER ['request _ method'] -- the request method used to access the page. For example, "GET", "HEAD", "POST", and "PUT ".

8. $ _ SERVER ['query _ string'] -- php server variable $ _ server query (query) STRING (the first question mark in the URL? ).

9. $ _ SERVER ['document _ root'] -- the ROOT directory of the DOCUMENT where the script is currently running. Defined in the server configuration file. E: server

10. $ _ SERVER ['HTTP _ ACCEPT '] -- php server variable $ _ SERVER the Accept of the current request: the content of the header information.

11. $ _ SERVER ['HTTP _ ACCEPT_CHARSET '] -- Accept-Charset of the current request: content of the header information. Example: "iso-8859-1, *, UTF-8 ".

12. $ _ SERVER ['HTTP _ ACCEPT_ENCODING '] -- Accept-Encoding of the current request: content of the header information. For example, "gzip ".

13. $ _ SERVER ['HTTP _ ACCEPT_LANGUAGE '] -- Accept-Language of the current request: content of the header information. For example, "en ".

14. $ _ SERVER ['HTTP _ connection'] -- CONNECTION of the current request: content of the header information. For example, "Keep-Alive ".

15. $ _ SERVER ['HTTP _ host'] -- php server variable $ _ server host of the current request: header information.

16. $ _ SERVER ['HTTP _ referer'] -- link to the URL of the previous page of the current page.

17. $ _ SERVER ['HTTP _ USER_AGENT '] -- return the browser information used by the user. You can also use get_browser () to obtain this information.

18. $ _ SERVER ['https'] -- If accessed through HTTPS, it is set to a non-null value; otherwise, off is returned.

19. $ _ SERVER ['remote _ ADDR '] -- browsing the IP address of the user on the current page.

20. $ _ SERVER ['remote _ host'] -- the HOST name of the user on the current page is being viewed. Reverse Domain name resolution is based on the user's REMOTE_ADDR. If the local test returns 127.0.0.1

21. $ _ SERVER ['remote _ port'] -- the PORT used by the user to connect to the SERVER. I did not pass the test on the local machine. I don't know why.

22. $ _ SERVER ['script _ filename'] -- the absolute path name of the currently executed SCRIPT. E: serverindex. php

23. $ _ SERVER ['server _ admin'] -- the value of the php server variable $ _ SERVER specifies the SERVER_ADMIN parameter in the Apache SERVER configuration file. If the script runs on a VM, the value is the value of that VM.

24. $ _ SERVER ['server _ port'] -- the PORT used by the SERVER. The default value is "80 ". If SSL secure connection is used, this value is the HTTP port set by the user.

25. $ _ SERVER ['server _ SIGNATURE '] -- a string containing the SERVER version and virtual host name.

26. $ _ SERVER ['path _ TRANSLATED '] -- the basic PATH of the file system where the current script is located (not the root directory of the document. This is the result of a virtual image to a real path on the server. Apache 2 users can use AcceptPathInfo On in httpd. conf to define PATH_INFO.

27. $ _ SERVER ['script _ name'] -- contains the path of the current SCRIPT. This php server variable $ _ SERVER is very useful when the page needs to point to itself. _ FILE _ contains the absolute path and FILE name of the current FILE (for example, including the FILE ).

28. $ _ SERVER ['request _ URI '] -- URI required to access this page. For example, "/index.html ".

29. $ _ SERVER ['php _ AUTH_DIGEST '] -- during HTTP Digest authentication when running as an Apache module, this variable is set to the "Authorization" HTTP header content sent by the client (For further authentication ).

30. $ _ SERVER ['php _ AUTH_USER '] -- when PHP runs in the Apache or IIS (PHP 5 is an ISAPI) module and is using the HTTP authentication function, this variable is the user name entered by the user.

31. $ _ SERVER ['php _ AUTH_PW '] -- when PHP runs in the Apache or IIS (PHP 5 is an ISAPI) module and is using the HTTP authentication function, this variable is the password entered by the user.

32. $ _ SERVER ['auth _ type'] -- when PHP runs in the Apache module mode and is using the HTTP authentication function, the php server variable $ _ SERVER is the authentication type.