I am generating a regular expression that can contain any letters or numbers or an underscore [a-zA-Z0-9_] but not contain words that exactly match log, login and lastly test.
Can anybody help me with this?
^(?!(^test$)|(^log$)|(^login$))([A-Za-z0-9_-/]+)$
Did the trick for me. Thanks for your answers guys
You can use this negative lookahead regex:
\b(?!log(?:in)?|test)\w+
(?!log(?:in)?|test) is negative lookahead, that will fail the match if any given words log,login,test are present.
I think the below regular expression should do the trick
^((?!log|login|test)[a-zA-Z0-9_])*$