How PHP determines whether the current operating system is Linux or Windows

Php_uname () The meaning of this function is to return information about the system currently running in PHP, and the following is a detailed description of this function:

1. /* * function: Returns information on the system currently running in PHP * @param string $mode  *       ' a ':  returns all information *       ' s ':  name of the operating system, such as FreeBSD *       ' n ':  the name of the host, such as cnscn.org *       ' R ':  version name, such as 5.1.2-release *       ' V ':  operating       System version number * */ string Php_uname ([string$mode

Examples of Use:

1. Echo Php_uname  echophp_uname

Php_os PHP comes with a built-in constant, which returns the server -side operating system identifier, value (WINNT,WIN32, etc.)

Examples of Use:

1. Echo Strtoupper (substr(php_os

Directory_separator PHP comes with a built-in constant that displays the system delimiter command, without any definition and inclusion to use directly. As we all know, the path delimiter under Windows is \ (and of course, it works on some systems), and the path delimiter on Linux is/,directory_separator the meaning of this constant exists is that different separators are displayed depending on the operating system.

An example of using Directory_separator to determine the operating system type is as follows:

1. Echo

Path_separator is a constant, in the Linux system is a ":" Number, Windows is a ";" No.

An example of using Path_separator to determine the operating system type is as follows:

1. Echo

How PHP determines whether the current operating system is Linux or Windows