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Get system name (PHP 4, PHP 5)
array posix_uname ( )

Gets information about the system.

Posix requires that assumptions must not be made about the format of the values, e.g. the assumption that a release may contain three digits or anything else returned by this function.

Return Values

Returns a hash of strings with information about the system. The indices of the hash are

  • sysname - operating system name (e.g. Linux)
  • nodename - system name (e.g. valiant)
  • release - operating system release (e.g. 2.2.10)
  • version - operating system version (e.g. #4 Tue Jul 20 17:01:36 MEST 1999)
  • machine - system architecture (e.g. i586)
  • domainname - DNS domainname (e.g.

domainname is a GNU extension and not part of POSIX.1, so this field is only available on GNU systems or when using the GNU libc.


Example 1889. Example use of posix_uname()


The above example will output something similar to:

   [sysname] => Linux
   [nodename] => funbox
   [release] => 2.6.20-15-server
   [version] => #2 SMP Sun Apr 15 07:41:34 UTC 2007
   [machine] => i686