php_uname() returns a string with a description of the operating system PHP is built on. If you're just wanting the name of the operating system, consider using the PHP_OS constant.
Example 1. Some php_uname() examples
There are also some related Predefined PHP constants that may come in handy, for example:
|Sites of interest: Web Hosting : Reseller Hosting : Website Hosting : HTML Editor : Web Design Templates : Free Web Hosting : ASP code examples : PHP & MySQL Code Examples|