captcha with php session variables + jquery validation

Question

i'm working on a contact form. i use this for form validation: http://plugins.jquery.com/project/form-validation-and-hints and i use a captcha that stores the code in $_SESSION['captchacode'] variable. what i'm trying to accomplish is to simply check using the jquery validator if user entered good captcha code. that's how check function works:

function isTypeValid( type, value ) {
var cap = <?php echo $SESSION["captchacode"];?>;
if( type == classprefix + 'Text' ) {        
    return true;
}

if( type == classprefix + 'Captcha' ) {
    if(value==cap){
    return (true);
}else{
    return false;
    }
}

}

i searched a few threads here and elsewhere and that's where i got

    var cap = <?php echo $SESSION["captchacode"];?>;

from.

i've also tried this:

    var cap = "<%= Session['captchacode'] %>";

and it didn't help... any ideas?

what's the point in using jquery for captcha valudation?

Your Common Sense
– Your Common Sense

2011-10-20 08:52:26 +00:00
Commented Oct 20, 2011 at 8:52 — Your Common Sense
– Your Common Sense, Commented Oct 20, 2011 at 8:52

Your Common Sense · Accepted Answer · 2011-10-20 08:54:04Z

2

Don't use jquery for captcha validation. Validate it on the server side.

also, the way you choose (with writing captcha value in the body of the script) is quite funny but it's merely a gift to possible spammer.

answered Oct 20, 2011 at 8:54

Your Common Sense

158k42 gold badges226 silver badges373 bronze badges

Sign up to request clarification or add additional context in comments.

3 Comments

user914321 Over a year ago

i want to use jquery because i use it anyway for all the fields validation and it'd be nice to use it also for captcha but i can't manage to validate it from session variable...

Your Common Sense Over a year ago

beside of "I want" one have to have "I know" and "I understand". And one have to understand that client-side captcha validation can protect NOTHING.

user914321 Over a year ago

ok that's fair enough:) i'll use a php validation script instead

mahadeb · Accepted Answer · 2011-10-20 09:01:09Z

0

You can use remote method of jquery validation plugin to check captcha. You can see example here -

http://jquery.bassistance.de/validate/demo/captcha

answered Oct 20, 2011 at 9:01

mahadeb

6864 silver badges10 bronze badges

Collectives™ on Stack Overflow

captcha with php session variables + jquery validation

2 Answers 2

3 Comments

Comments

Your Answer

Hot Network Questions

Collectives™ on Stack Overflow

2 Answers 2

3 Comments

Comments

Your Answer

Sign up or log in

Post as a guest

Related