Class: Form Spam Bot Blocker (spam, browser detection, robot, bot)

Name:	Form Spam Bot Blocker Support forum
Base name:	`fsbb`
Description:	Generate forms that prevent submission by robots
Search tags:	spam, browser detection, robot, bot
Version:	`0.1`
Required PHP version:	`4.0`
License:	GNU Lesser General Public License (LGPL)
All time users:	2417 users
All time rank:	812
Week users:	15 users
Week rank:	404

	Supplied by		Groups		Detailed description

	User ratings		Trackback		Applications		Files

Supplied by:

Name: Giorgos <e-mail contact>

Published packages: 7

Country: Greece - PHP jobs in Greece

Home page: http://microo.net/

Age: 29

All time rank: 10

Week rank: 19

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Innovation Award:

April 2007
Number 3

More and more people have been using robots to make abusive use of Web sites. Usually robots pretend to be real users, or make unauthorized copies of whole sites, or even causing excessive to the site servers.

Many sites have implemented measures to halt robots like using CAPTCHA (Completely Automated Public Turing test to tell Computers and Humans Apart) validation forms. However, this kind of validation is usually a little annoying to the users.

This class implements other measures that may help detecting when robots are using Web forms without being too intrusive to the users.

This way the users are usually not aware of the measures that have been implemented to halt robots, but not real humans.

Manuel Lemos

Groups:

HTML HTML generation and processing View top rated classes

Validation Validation algorithms View top rated classes

Security Security protection and attack detection View top rated classes

Detailed description:

This class can be generate forms that prevent submission by spam robots without requiring human users to enter special values.

It generates hidden inputs for forms that have special values that are verified on the server after the form is submitted to eventually detect whether the form was sent by a spam robot.

The class can generate an hidden input that contains an encoded value of the user browser, user computer IP address and the current time.

The class verifies whether these browser name and IP address are still the same, and also whether the form is being submitted by a normal time interval after it was create, like when it is submitted by a real human user.

The class also generates a text input that are invisible for the user. A human user would not fill this input. If the input is submitted with a value, it was certainly a robot.

When the class detects a situation that demonstrates the form was submitted by a robot, the application should not accept the form submission.

User ratings:

Ratings	Utility	Consistency	Documentation	Examples	Tests	Videos	Overall	Rank
All time:	`Good (93.2%)`	`Good (93.2%)`	`Good (81.8%)`	`Good (81.8%)`	`-`	`-`	`Sufficient (72.3%)`	95
Month:	Not yet rated by the users

Trackback links:

Link Description

Stop bots from submitting contact forms have been using this code for a while and it seems to work but i don’t think it is 100% infallible...

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Applications that use this class:

No application links were specified for this class.

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Files:

File	Role	Description
`fsbb.php`	Class	the class source
`readme.txt`	Doc.	the doc file
`example.php`	Example	an example of a protected web form
`action.php`	Example	an example of a protected form submission

Download all files: fsbb.tar.gz fsbb.zip

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Class: Form Spam Bot Blocker

Supplied by:

Innovation Award:

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Detailed description:

User ratings:

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Applications that use this class:

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