php_uname

Description

string php_uname ( [string mode] )

php_uname() returns a description of the operating system PHP is running on. For the name of just the operating system, consider using the PHP_OS constant, but be reminded this constant will contain the operating system PHP was built on.

On Unix, the output reverts to displaying the operating system information PHP was built on if it cannot determine the currently running OS.

mode is a single character that defines what information is returned:

'a': This is the default. Contains all modes in the sequence "s n r v m".
's': Operating system name. eg. FreeBSD.
'n': Host name. eg. localhost.example.com.
'r': Release name. eg. 5.1.2-RELEASE.
'v': Version information. Varies a lot between operating systems.
'm': Machine type. eg. i386.

例子 1. Some php_uname() examples
<?php echo php_uname(); echo PHP_OS; /* Some possible outputs: Linux localhost 2.4.21-0.13mdk #1 Fri Mar 14 15:08:06 EST 2003 i686 Linux FreeBSD localhost 3.2-RELEASE #15: Mon Dec 17 08:46:02 GMT 2001 FreeBSD Windows NT XN1 5.1 build 2600 WINNT */ if (strtoupper(substr(PHP_OS, 0, 3)) === 'WIN') { echo 'This is a server using Windows!'; } else { echo 'This is a server not using Windows!'; } ?>

There are also some related Predefined PHP constants that may come in handy, for example:

例子 2. A few OS related constant examples
<?php // *nix echo DIRECTORY_SEPARATOR; // / echo PHP_SHLIB_SUFFIX; // so echo PATH_SEPARATOR; // : // Win* echo DIRECTORY_SEPARATOR; // \ echo PHP_SHLIB_SUFFIX; // dll echo PATH_SEPARATOR; // ; ?>

add a note User Contributed Notes

simon at NOSPAM dot zadra dot org
20-Jan-2006 01:26


Contrary to the last note, PHP_OS does display the OS PHP runs on currently, whereas php_uname() displays the Operating system version via uname. 

This has nothing to do with the system PHP was built on.

michiel1978 /*at*/ hotmail /*dot*/ com
12-Dec-2005 06:38


Example 1 in this article is a little bit misleading. The comment on the last block of code says it will output the server's operating system, but in reality (and according to this same article), it will output the operating system on which PHP was built, because it uses the constant PHP_OS.

tac at smokescreen dot org
15-Jan-2005 07:25


In php 4.1.2, php_uname('n') returns a warning about an invalid parameter count.  Change it to @php_uname to hide this warning.

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