Regular Expression for password validation

Question

Hi,

can any one help me in creating a regular expression for password validation.

The Condition is "Password must contain 8 characters and at least one number, one letter and one unique character such as !#$%&? "

Answer 1

^.*(?=.{8,})(?=.*[a-zA-Z])(?=.*\d)(?=.*[!#$%&? "]).*$

---

^.*              : Start
(?=.{8,})        : Length
(?=.*[a-zA-Z])   : Letters
(?=.*\d)         : Digits
(?=.*[!#$%&? "]) : Special characters
.*$              : End