cluv
Reputation: 620
regex to validate a username
I would like to validate a username with these parameters: "it may only contain alphanumeric characters or dashes and cannot begin with a dash and must have a length between 2-20 characters"
this is my attempt, but it's not quite right
/^[a-z0-9]+([a-z0-9-]+[a-z0-9])?$/i
thanks for any help
Upvotes: 0
Views: 931
Answers (1)
Explosion Pills
Reputation: 191749
/^[a-z0-9][-a-z0-9]{1,19}$/i
[^-] allows all sorts of non alphanumeric characters.
Upvotes: 4
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