Question

So I’m trying to write a regex and get it to match the string ONLY if the string doesn’t start with the string ‘username’

I tried something like ^([^username])… but that matches strings where the string doesn’t start with any of those letters.

Any help would be appreciated!

Answer 1

^(?!username)

using a negative lookahead.

The other option, depending on what your doing, would be to simply invert your logic. For instance, if you were doing

if foo matches <regex>

then just do

if !(foo matches <regex>)