RegEx to make sure that the string contains at least one lower case char upper case char digit and symbol

Question

What is the regex to make sure that a given string contains at least one character from each of the following categories     Lowercase character Uppercase character Digit  Symbol   I know the patterns for individual sets namely  a-z    A-Z    d and      w   I got them correct  didn t I      But how do I combine them to make sure that the string contains all of these in any order

User · Answer

Bart Kiers  your regex has a couple issues  The best way to do that is this       a-z              For lower cases     A-Z              For upper cases     d                For digits   In this way you are searching no matter if at the beginning  at the end or at the middle  In your have I have a lot of troubles with complex passwords

User · Answer

If you need one single regex  try         d       a-z        A-Z        W    A short explanation         a-z             use positive look ahead to see if at least one lower case letter exists       A-Z             use positive look ahead to see if at least one upper case letter exists       d               use positive look ahead to see if at least one digit exists       W             use positive look ahead to see if at least one non-word character exists   And I agree with SilentGhost   W might be a bit broad  I d replace it with a character set like this   -         amp        feel free to add more of course

User · Answer

You can match those three groups separately  and make sure that they all present  Also     w  seems a bit too broad  but if that s what you want you might want to replace it with  W

[regex] RegEx to make sure that the string contains at least one lower case char, upper case char, digit and symbol

Examples related to regex