exclude underscore from alpha numeric regex

Question

I want use w regex for to allow alpha numeric but I don't want underscore _ to be part of it. Since _ is included in w. So I have coded like this but doesn't work, what is my mistake?

(/^rogerw{2,3}[0-9a-z]/i)

I am expecting any character other than A-Z or 1-2 to be exclude

ex - roger3_2 or roger46_ or roger2_

but

roger54 or roger4a or roger455 or rogerAAA

are to be ok

Answer 1

You could try something like:

[^_W]+