How can I make a regular expression match upper and lower case?

Question

I don\'t really know much about regex at all, but if someone could help me change the following code to also allow for lowercase a-z, that would be great!

$(         


        

Answer 1

If you want a regular expression to be case-insensitive, add a i modifier to the end of the regex. Like so:

/[A-Z]{3}([0-9]{1,4})?|[A-Z]{1,3}/i