PHP script - detect whether running under linux or Windows?

php windows linux operating-system detect

Check the value of the PHP_OS constant^Docs.

It will give you various values on Windows like WIN32, WINNT or Windows.

if (strtoupper(substr(PHP_OS, 0, 3)) === 'WIN') {    echo 'This is a server using Windows!';} else {    echo 'This is a server not using Windows!';}

php windows linux operating-system detect

You can check if the directory separator is / (for unix/linux/mac) or \ on windows. The constant name is DIRECTORY_SEPARATOR.

if (DIRECTORY_SEPARATOR === '/') {    // unix, linux, mac}if (DIRECTORY_SEPARATOR === '\\') {    // windows}

php windows linux operating-system detect

if (strncasecmp(PHP_OS, 'WIN', 3) == 0) {    echo 'This is a server using Windows!';} else {    echo 'This is a server not using Windows!';}

seems like a bit more elegant than the accepted answer. The aforementioned detection with DIRECTORY_SEPARATOR is the fastest, though.

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