I need help creating the regex for a password.
The password can contain letters, numbers, underscores ( _ ), dollar signs ( $ ) and hyphens ( - ), must be at least 3 characters long and at most 30 characters long.
-
2If you find yourself asking a multiple questions about a specific topic, it might be worth investing some time to learn the basics so you can solve the trivial tasks yourself. There are many tutorials around for regexes, e.g. regex.learncodethehardway.orghuon– huon2012-05-05 07:04:36 +00:00Commented May 5, 2012 at 7:04
-
You may find this useful regexbuddy.com/create.htmlvascowhite– vascowhite2012-05-05 07:07:15 +00:00Commented May 5, 2012 at 7:07
-
1That's quite a restrictive collection of characters. Why are you forcing people to make passwords less secure by outlawing lots of common characters (such as % and ^)?Quentin– Quentin2012-05-05 07:12:19 +00:00Commented May 5, 2012 at 7:12
-
This is actually for a username, Shouldn't have put password there... Whoopsketo23– keto232012-05-05 07:19:58 +00:00Commented May 5, 2012 at 7:19
Add a comment
|
2 Answers
Letters, numbers, underscores, dollar signs and hyphens are covered by this:
[a-zA-Z0-9_$-]
Limiting it to 3 to 30 is covered by this:
{3,30}
In the end, we can reduce it a bit by adding the case-insensitive modifier:
/^[a-z0-9_$-]{3,30}$/i
Adding the ^ and $ force it to match from start to finish, meaning we won't be matching a subset of the tested string. Either the entire submitted string passes, or fails.
You can try it out against a few password by visiting http://regexr.com?30ru6
1 Comment
Sampson
@keto23 My pleasure. Remember to study the solution, ask questions, and learn from these answers.
/[a-z0-9_$-]{3,30}/
Will match according to your requirements.
