What are the potential pitfalls of using backslashes in file paths in PHP?

Using backslashes in file paths in PHP can cause issues because backslashes are escape characters in PHP. This can lead to unintended consequences such as the backslashes being interpreted as escape characters instead of path separators. To avoid this issue, it's recommended to use forward slashes (/) in file paths instead of backslashes.

$file_path = "path/to/file.txt";