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Anti spam form without captcha

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*rocky5    (2009-01-22)
 
Anti spam form without captcha


Hi,

I'm looking for some new ways to make a secure anti-spam form without captcha, I know a few ways, but I'd like to find others.

Here's what I implemented :

- Hidden field with the date then verification by PHP (a human can't post in milliseconds)
- Hidden empty field to be filled by bots with CSS style="display:none"

Also what's the effect of this line ?

<input type="submit" name="submit" value="Submit" onClick="this.form.submit(); this.disabled=true;">

Thanks !



(more options below)

*0642c4    (2009-02-24 19:16:31)
this.disabled=true;

The aim of this line is only to prevent a user to post the same content twice!

<input type="submit" name="submit" value="Submit" onClick="this.form.submit(); this.disabled=true;">



*847dd7    (2009-05-25 14:30:53)
opinion

Chrome still doesn't support Linux-based systems ht*p://www.frogmix.com/search/Linux-based+systems . I'm really disappointed that they haven't yet released version of Chrome with native Linux support. Seems like they’re missing a large audience until they do.


*f135a7    (2010-01-05 15:45:23)
8 years ago

ht*p://www.orisline.ru/ the best anti captcha sample


kadir41    (2010-04-28 16:19:34)
8 years ago

I don't know how work scripts for this purpose, but I have done very good protection for my site with form creator and captcha.


*notan    (2010-12-28 20:12:44)
7 years ago

I'd like to introduce the conceptually new captcha from KeyCAPTCHA.com.
FEATURES:
- Free of charge service with free online support,
- Easy and entertaining for human,
conceptually unbreakable for automated bots,
- Nontransferable to 3d parties (required for human solution by sweatshops),
- Lossless (filled by a visitor data, like username, password, etc.,  is preserved in case of incorrect solution),
- many other features and levels of protection.


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