Hướng dẫn dùng uname linux trong PHP

(PHP 4 >= 4.0.2, PHP 5, PHP 7, PHP 8)

php_uname — Returns information about the operating system PHP is running on

Description

php_uname(string $mode = "a"): string

On some older UNIX platforms, it may not be able to determine the current OS information in which case it will revert to displaying the OS PHP was built on. This will only happen if your uname() library call either doesn't exist or doesn't work.

Parameters

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.

Return Values

Returns the description, as a string.

Examples

Example #1 Some php_uname() examples

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
*/

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

Example #2 A few OS related constant examples

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

// Win*

See Also

• phpversion() - Gets the current PHP version
• php_sapi_name() - Returns the type of interface between web server and PHP
• phpinfo() - Outputs information about PHP's configuration

pyst ¶

1 year ago

Note that the argument is not a "format". This means that ('a') ?> is not equivalent to ('s n r v m') ?>, but rather ('s') . ' ' . uname('n') . ' ' . uname('r') . ' ' . uname('v') . ' ' . uname('m') ?>.

Ricardo Striquer (ricardophp yohoocombr) ¶

2 years 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 '

';
echo '(void): '.php_uname()."\n"; // output: "(void): Linux web989.uni5.net 4.4.180 #1 SMP Wed May 22 15:27:37 -03 2019 x86_64"
echo 'a: '.php_uname('a')."\n"; // output: "a: Linux web989.uni5.net 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: web989.uni5.net"
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 '

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.

Yzmir Ramirez ¶

11 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.