Regex Letters, Numbers, Dashes, and Underscores

Question

Im not sure how I can achieve this match expression. Currently I am using,

([A-Za-z0-9-]+)

...which matches letters and numbers. I would

Answer 1

Your expression should already match dashes, because the final - will not be interpreted as a range operator (since the range has no end). To add underscores as well, try:

([A-Za-z0-9_-]+)