regex for password validation - convert PHP regex to JavaScript regex

[kummu4help]

can anyone give me a regex to validate the password with following conditions

1. password should have atleast one alphabet and atleast one digit.
2.password should be atleast 6 characters and maximum of 8.
3. also password can allow specialcharacters but it is not mandatory.
without spl.characters also password is valid but it should have atleast one alphabet and minimum 1 digit.

hope i am clear.
i tried with ctype_alnum() function in php but it is accepting if all characters or either alphabet or digit. but i want to enforce atleast one alphabet and one digit should be in password

can any one give me a regex for this pls.....

[kummu4help]

at present i am trying with the following code

function isAlphaNumeric($sInput)
{
if(false===(preg_match("/[a-zA-Z]/", $sInput) > 0))
{
return false;
}
if(false===(preg_match("/[0-9]/", $sInput) > 0))
{
return false;
}
return true;
}

can anyone improve it to suite my requirements which i specified above

[kummu4help]

now i am trying with the following

    if(false===(preg_match("/^(?=.*\d)(?=.*[a-z]).{6,8}$/", $sInput) > 0))
    {
        return false;
    }

it's working fine.
but i want to use the same expression in javascript also for client side validation

can any one tell me how i can use the same regular expression in javascript.
i am trying with following but it's not working

    var regex=/\(?=.*\d\)\(?=.*[a-z]\).{6,8}/;
    if(regex.test(pword))
    {
        alert("valid password");
    }
        else
        {
                  alert("invalid password");
         }
 

[kummu4help]

Hi
i have the following regex in php and it's working fine for me

if(false===(preg_match("/^(?=.*\d)(?=.*[a-z]).{6,8}$/", $sInput) > 0))
{
return false;
}

but i want to use the same regex in javascript for the sake of client side validation
can anyone tell how i can use the same regex in java script
the regex should test the following in a password

1. password should contain atleast one numeric and one alphabet
2.password should be in between 6 to 8 characters

i am trying with the following but it's not working.

var regex=/\(?=.*\d\)\(?=.*[a-z]\).{6,8}/;
if(regex.test(pword))
{
alert("valid");
}
else
{
alert("invalid");
}

[anijos]

try this

var regex = /(?=.*\d)(?=.*[a-z]).{6,8}/;

[Markus]

First of all, kummu4help, we do not just happily 'hand out' code to anyone who asks for it. You have to show effort and understanding for us to help you.

Secondly, this is the PHP forum. If you're having problems with javascript, then you should go to javascript and ask.

Moderator.

[acoder]

JavaScript doesn't support atomic grouping - see Regular Expressions JavaScript.

So you'll have to try to find a combination that could work in one go or use two separate tests.

[kummu4help]

Hi acoder,
the following regex was working fine for me in javascript.
i forgot to place the $ sign at the end

var regex=/\(?=.*\d\)\(?=.*[a-z]\).{6,8}$/;
if(regex.test(pword))
{
alert("valid");
}
else
{
alert("invalid");
}

now i want to improve this so that it can work for caseinsensitive also.
but i don't know where to put the i (case insensitive) in the above regex
can u help me please....

[acoder]

You also need an opening caret ^ at the beginning. For case-insensitive matches, use the i modifier, e.g. /^[a-z]+/i

[acoder]

Merged threads since they're on the same topic.

Moderator.