Regular Expression for username
- by neobie
I need help on regular expression on the condition (4) below:
Begin with a-z
End with a-z0-9
allow 3 special characters like ._-
The characters in (3) must be followed by alphanumeric characters, and it cannot be followed by any characters in (3) themselves.
Not sure how to do this. Any help is appreciated, with the sample and some explanations.