What is the recommended method in PHP to retrieve information about the operating system on the server?

To retrieve information about the operating system on the server in PHP, you can use the `php_uname()` function. This function returns a description of the operating system PHP is running on, including details like the operating system name, version, and architecture. By using `php_uname()`, you can easily gather information about the server's operating system for diagnostic or logging purposes.

// Retrieve information about the operating system on the server
$osInfo = php_uname();
echo "Operating System Information: " . $osInfo;