$_SERVER[’PHP_SELF’],$_SERVER['REQUEST_URI'],$_SERVER[’SCRIPT_NAME’]的区别

$_SERVER[’PHP_SELF’]

• 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’] we have the file name /example/index.php returned to us both when we did and did not actully type it in the URL. When we appended variables to the end of it, they where truncated and again /example/index.php was returned. The only one that produced a different result was when we appended directories after the file name. In that case, it returned those directories.

$_SERVER['REQUEST_URI']

• 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

In all of our examples, this returned exactly what we entered for the URL. It returned a plain /, the file name, the variables, and the appended directories, all just as they had been entered.

$_SERVER[’SCRIPT_NAME’]

• 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 -- -- -- /example/index.php

In all cases here we were returned only the file name /example/index.php regardless of if it was typed, not typed, or anything was appended to it.