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Can anyone provide a regular expression for username and password?
Username: Shouldn’t start for digit with minimum 6 character.
Password: Alphanumeric with at least 6 character.
There is no upper bound on number of characters though.
For the username, first get anything that is not a number, than any characters for at least 5 length. For multibyte chars, like é, I suggest the u modifier. For the password, use alphanumerics and at least 6 of them, and note the i modifier for case insensitivity( makes the regex shorter this way ).