How do I convert many text files from <some_encoding> to utf8-no-bom?

Question

I'm looking to convert lots of text files (40+) from ISO-Latin-1 to UTF8-no-bom. How can I accomplish this?

Solution

From stackoverflow:

• You can get a tool such as iconv from GnuWin32 and 
  run a batch script to process all of your files that way.
  
  But what encoding are they now? If they're ANSI, 
  and you're not using any bytes with values => 128,
  then they're already BOM-less UTF-8.
  Perhaps you can use that to narrow down the number of 
  files you'd have to process - maybe enough that you only have a
  few files to convert (and might prefer to do it on an individual basis).

• Actually, I do it with Notepad++.
  Before trying this, you must make a backup of your files.
  You need to create a macro that does this:
  
  
  Convert the currently opened file to UTF-8 w/o BOM;
  Select all the text in your file, and copy it
  (why this? it looks like a bug. if you won't do this,
  your file will be replaced with your current clipboard content...);
  Save the current file;
  Close the current file.
  Save this macro.
  
  Now, open your PHP files, and run it with the "Run a Macro Multiple 
  Times..." command. If you opened 100 files, let it run for 100 times.
  

Comments

[RProgram]

I wrote what encoding is above. ISO-Latin

[Ramhound]

I could have sworn your original revision did not indicate the encoding hence the comment.

[HikeMike]

In the future, please edit your answers to correct any mistakes instead of posting new ones.

[pabouk - Ukraine stay strong]

It would be really useful to explain how to run the code.