The difference between $_server[php_self] and $_server[script_name in PHP _php skill

"Php_self"
The name of the file that is currently executing the script, related to document root. For example, using $_server[' php_self ' in a script with a URL address of Http://www.jb51.net/test.php/foo.bar will get/test.php/foo.bar this result. The __FILE__ constant contains the absolute path and file name of the current (for example, included) file.

"Script_name"
The path that contains the current script. This is useful when the page needs to point to itself. __FILE__ contains the absolute path and file name of the current file (for example, include files).

The main reasons for such as: $_server[' php_self ']? $_server[' php_self ']: $_server[' script_name '];

The reasons for finding better are:
Today, installing a PHP program on the DreamHost found that the connection address will be a cgi-system, but the program config is not a problem, check the data to find out is script_name and php_self different problems caused.
It's usually not $_server[' script_name ' with $_server[' php_self ' in this test, because most PHP is not run in CGI mode.
But PHP on the DreamHost is running in CGI, and there is a distinct difference.
echo $_server[' Script_name ']; (/cgi-system/php.cgi)
echo $_server[' php_self ']; (/admin/test.php)

A note was found from http://lists.nyphp.org/pipermail/talk/2005-July/015339.html. Said the foreigner.

Script_name solves all the problems mentioned
In this thread-it ' s just the script name, without any extra garbage
That might is tacked on by the user. Php_self explicitly includes that
Extra garbage, so solutions in this thread that involve stripping the
Garbage off of Php_self to make it safe are really, really missing the
Point-just use Script_name instead. Please don ' t use FORM action= "";
According to the spec, what the browser does with this is undefined, so
Even if it works in the current browsers, it might not work in future ones