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(PHP 4 >= 4.0.2, PHP 5, PHP 7)

php_uname Retorna informação sobre o sistema operacional que o PHP foi construído


php_uname ( ) : string

php_uname() retorna uma string com a descrição do sistema operacional que o PHP foi construído. Se você quer apenas o nome do sistema operacional, considere usar a constante PHP_OS.

Exemplo #1 Alguns exemplos de php_uname()

echo php_uname();

/* Algumas saídas possíveis:
Linux localhost 2.4.21-0.13mdk #1 Fri Mar 14 15:08:06 EST 2003 i686

FreeBSD localhost 3.2-RELEASE #15: Mon Dec 17 08:46:02 GMT 2001

Windows NT XN1 5.1 build 2600

if (strtoupper(substr(PHP_OS03)) === 'WIN') {
'Este é um servidor usando!';
} else {
'Este é um servidor que não usa Windows!';


Existem também algumas Constantes pré-definidas que podem ser úteis, por exemplo:

Exemplo #2 Algumas constantes relacionadas com o sistema operacional

// *nix
echo PHP_SHLIB_SUFFIX;    // so
echo PATH_SEPARATOR;      // :

// Win*
echo PHP_SHLIB_SUFFIX;    // dll
echo PATH_SEPARATOR;      // ;

Veja também phpversion(), php_sapi_name() e phpinfo().

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User Contributed Notes 4 notes

Grzechooo+php at gmail dot com
8 years ago
Note that PHP won't tell you that it reverted to displaying platform it was built on.
Yzmir Ramirez
9 years ago
Note that php_uname('n') does not always equal $_SERVER['HOST_NAME']

The machine that you are running the script may server many different host names so don't use this when building urls.
2 months ago
Note that the argument is not a "format". This means that <?php uname('a') ?> is not equivalent to <?php uname('s n r v m') ?>, but rather <?php uname('s') . ' ' . uname('n') . ' ' . uname('r') . ' ' . uname('v') . ' ' . uname('m') ?>.
Ricardo Striquer (ricardophp yohoocombr)
1 year ago
Although it does not indicate receiving parameters this function allows some chars as parameters, they are the options a; m; n; r; s; v.

I don't know exactly what each one does, but below is a code example and its output on PHP 5.5 running on RedHat 4.4

echo '<pre>';
'(void): '.php_uname()."\n"; // output: "(void): Linux 4.4.180 #1 SMP Wed May 22 15:27:37 -03 2019 x86_64"
echo 'a: '.php_uname('a')."\n"; // output: "a: Linux 4.4.180 #1 SMP Wed May 22 15:27:37 -03 2019 x86_64"
echo 'm: '.php_uname('m')."\n"; // output: "m: x86_64"
echo 'n: '.php_uname('n')."\n"; // output: "n:"
echo 'r: '.php_uname('r')."\n"; // output: "r: 4.4.180"
echo 's: '.php_uname('s')."\n"; // output: "s: Linux"
echo 'v: '.php_uname('v')."\n"; // output: "v: #1 SMP Wed May 22 15:27:37 -03 2019"
// echo file_get_contents('/etc/issue')."\n";

echo '</pre>';

Note that I used file_get_contentes with a file, that file is present in most linux boxies and varies on content, but most of times it indicates kernel version, linux version, distribution and so on. In my case my user didn't have access to the file, so to identify that it was a red hat I paid attention to php_info outputs, there in the middle was the postgress driver description, p. eg indicating the distribution.

I guess there is no easy way to find out the server version programmatically a 100% of times, but by and large you can get around by yourself.
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