Differences between PHP_SELF, SCRIPT_NAME, and REQUEST_URI

This article mainly introduces the differences between PHP_SELF, SCRIPT_NAME, and REQUEST_URI. For more information, see $ _ SERVER [PHP_SELF], $ _ SERVER [SCRIPT_NAME]. $ _ SERVER ['request _ URI '] is very similar in usage. they return information related to the currently used page address. Here are some examples, help determine which ones are most suitable for your script.

$ _ SERVER ['php _ SELF ']

The code is as follows:

Http://www.yoursite.com/example/---/example/index. php
Http://www.yoursite.com/example/index.php---/example/index. php
Http://www.yoursite.com/example/index.php? A = test---/example/index. php
Http://www.yoursite.com/example/index.php/dir/test---/dir/test

When we use $ _ SERVER ['php _ SELF '], no matter whether the Accessed URL address has an index. php, it will automatically return index. php. however, if a slash is added after the file name, all the subsequent content will be returned in $ _ SERVER ['php _ SELF '].

$ _ SERVER ['request _ URI ']

The code is as follows:

Http://www.yoursite.com/example ---/
Http://www.yoursite.com/example/index.php---/example/index. php
Http://www.yoursite.com/example/index.php? A = test---/example/index. php? A = test
Http://www.yoursite.com/example/index.php/dir/test---/example/index. php/dir/test

$ _ SERVER ['request _ URI '] returns the exact address we wrote in the URL. if the URL is only written to "/", it returns "/".

$ _ SERVER ['script _ name']

The code is as follows:

Http://www.yoursite.com/example/---/example/index. php
Http://www.yoursite.com/example/index.php---/example/index. php
Http://www.yoursite.com/example/index.php---/example/index. php
Http://www.yoursite.com/example/index.php/dir/test---/example/index. php

The current file name/example/index. php is used in all the returned results.