# password

match a password

Minimum eight characters, at least one upper case English letter, one lower case English letter, one number and one special character

In this case a password may contain:

  • (?=.*?[A-Z]) : At least one upper case English letter
  • (?=.*?[a-z]) : At least one lower case English letter
  • (?=.*?[0-9]) : At least one digit
  • (?=.*?[#[email protected]$ %^&*-]) : At least one special character or space
  • .{8,} : Minimum eight in length

The lookahead ( (?=.*?[A-Z]) ) is used to check if after some characters if there is an occurance of an upper case letter. Similarly all the other lookaheads(lower, numbers, etc) are checked to complete the whole regex.


Cheatsheet

expr usage
iHateRegex
by geon

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