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php_uname

(PHP 4 >= 4.0.2)

php_uname --  Returns information about the operating system PHP was built on

Description

string php_uname ( void )

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

<?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:

Example 2. A few OS related constant examples

<?php
// *nix
echo DIRECTORY_SEPARATOR; // :
echo PHP_SHLIB_SUFFIX;    // so

// Win*
echo DIRECTORY_SEPARATOR; // ;
echo PHP_SHLIB_SUFFIX;    // dll
 ?>

See also phpversion(), php_sapi_name(), and phpinfo().

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