What are the potential differences in PHP behavior when transferring scripts from a Linux server to a Windows server?

When transferring PHP scripts from a Linux server to a Windows server, one potential difference in behavior is related to file paths. Windows servers use backslashes (\) in file paths, while Linux servers use forward slashes (/). To ensure compatibility, it's recommended to use the PHP constant DIRECTORY_SEPARATOR, which automatically selects the correct separator based on the server's operating system.

// Use DIRECTORY_SEPARATOR constant to ensure cross-platform compatibility
$filePath = 'path' . DIRECTORY_SEPARATOR . 'to' . DIRECTORY_SEPARATOR . 'file.php';