How to quickly get the operating system type through PHP (3 methods)

In actual development, there are often different processing methods due to different operating systems. So how to determine whether the user's operating system is Windows or Linux? Get the current operating system type? The following article will introduce to you several methods to obtain the current operating system type.

We all know that if you want to know the type of operating system in your computer, you can right-click "Computer"-"Properties" and you can see the version information in the pop-up window:

#So how to use PHP code to get the type of the current operating system? In fact, PHP has some built-in variables (constants) or functions that can be implemented. Today, this article will take you to understand these variables (constants) or functions.

1. Use the PHP environment variable HTTP_USER_AGENT

HTTP_USER_AGENT The variable can be used to obtain user client information, including operating system and browser.

You only need to use HTTP_USER_AGENT to obtain the user client information, then parse the variable and determine the type of operating system.

Let’s take a look at the implementation code:

<?php
header("content-type:text/html;charset=utf-8");
$viewer = getenv("HTTP_USER_AGENT");

$platform = "";
if (preg_match("/Windows/i", "$viewer")) {
	$platform = "Windows";
} else if (preg_match("/Linux/i", "$viewer")) {
	$platform = "Linux";
}
echo("当前操作系统类型是：$platform");
?>

Output result:

2. Use predefined constants PHP_OS

PHP_OSConstant can get the current operating system name. Just output it directly.

<?php
header("content-type:text/html;charset=utf-8");
echo "当前操作系统类型是：".PHP_OS;
?>

Output result:

3. Use the php_uname() function

php_uname — Return to run PHP Information about the system.

Syntax: php_uname ([$mode])

mode is a single character that defines what information to return:

' a': This is the default. Contains all patterns in the sequence "s n r v m".

’s’: operating system name. For example: FreeBSD.

‘n’: host name. For example: localhost.example.com.

‘r’: Version name, for example: 5.1.2-RELEASE.

‘v’: version information. There are big differences between operating systems.

‘m’: machine type. For example: i386.

The php_uname() function returns a description of the operating system running php, which is the same string output at the top of phpinfo(). If you just want to get the name of the operating system. Consider using the constant PHP_OS, but be aware that this constant will contain the name of the operating system when PHP was built.

Let’s take a look at the implementation code:

<?php
header("content-type:text/html;charset=utf-8");
echo "当前操作系统类型是：".php_uname(&#39;s&#39;);
?>

Output result:

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