Question

I have regular expression which tests following rules,

1. Password must have at-least one char.
2. Password must have at-least one numeric.
3. Password must have at-least one alphanumeric char.(More then one should be allowed)

My attempt is this,

/^([a-zA-Z+]+[0-9+]+[!@#$%^&*])$/

This works fine as for most cases except if I add more then one alpha-numeric chars.

Tests

• Test [qwer1234] Result [Not Valid] Conclusion [Passed]
• Test [qwer1234$] Result [Valid] Conclusion [Passed]
• Test [qwer1234#$] Result [Not Valid] Conclusion [Failed]

The last test should get Passed but it fails. I know where things are wrong but couldn’t get hang of the regex magic. My thoughts about what is wrong is,

[0-9+] // This + sign shows that you can have more then 1 of that range of numerics

Where,

[!@#$%^&*] // Does not have the + sign

I tried,

[!@#$%^&*+] // Does not have the + sign
[!@#$%^&*]+ // Does not have the + sign

Both didn’t work. What am I missing?

Answer 1

Depending on what you actually need, from your confusing description of your situation, here are two regexes that I hope help. This first one requires that the password start with at least 1 Alphabetic character, have at least 1 Numeric character second, then at least 1 Special character last.

/^([a-zA-Z]+[0-9]+[!@#$%^&*]+)$/

http://jsfiddle.net/ECwP8/

If you don’t require the characters to come in a specific order, you can try this regex:

/(?=[^a-zA-Z]*[a-zA-Z])(?=[^0-9]*[0-9])(?=[^!@#$%^&*]*[!@#$%^&*])/

http://jsfiddle.net/bJTTk/1/

This one simply requires that there be at least 1 Alphabetic character, at least 1 Numeric character, and at least 1 Special character, occur in the password in any order.