How has support for opening files (open, three-arg open) changed across recent Perl versions?

In recent versions of Perl, the support for opening files has evolved significantly, especially concerning the use of the three-argument version of the `open` function. This version offers improved handling of file modes, allowing for greater compatibility and security compared to the older two-argument version.

The three-argument `open` provides better control over filehandle behavior by allowing you to specify the mode (read, write, append) and the layer (such as encoding). This feature is particularly useful when working with text data in various encodings, making it easier to manage how data is read from or written to files. It also guards against potential security issues associated with unsanitized filenames.

To use the three-argument format, you can write your code as shown below:

With the transition to newer Perl versions, developers are encouraged to adopt this three-argument method for opening files to ensure best practices, especially in terms of handling file I/O safely and efficiently.