PHP photo text authorization

**ZeldorBlat** · Jun 17 '07, 08:05 PM

Re: PHP photo text authorization

On Jun 17, 3:43 pm, "MZ" <marcinzmyslow. ..@poczta.onet. plwrote:

Hello!
>
I would like to create similar script which let me (before submitting form)
confirm the form. I would like to prevent from autosubmitting form by
various users.
I would like to create jpg frame with text generated inside and I would like
to force the users to fill the input field with this text shown in jpg
frame. This is the example:
>

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>
Could you write to me how can I do that? I would like this scripts to
autogenerate every word with static length in this jpg frame, which often
would have no meaning and sense and would be the string with different
letters and numbers.
>
Kindest regards
Marcin

Here's some examples and documentation on this type of thing:

<http://www.google.com/search?q=captch a+php>

**Michael Fesser** · Jun 17 '07, 08:15 PM

Re: PHP photo text authorization

..oO(ZeldorBlat )

>Here's some examples and documentation on this type of thing:
>
><http://www.google.com/search?q=captch a+php>

Not to forget the possible problems:

CAPTCHA - Wikipedia

http://en.wikipedia.org/wiki/Captcha#Accessibility

Inaccessibility of CAPTCHA

http://www.w3.org/TR/turingtest/

Various approaches have been employed over many years to distinguish human users of web sites from robots. The traditional CAPTCHA approach asking users to identify obscured text in an image remains common, but other approaches have emerged. All interactive approaches require users to perform a task believed to be relatively easy for humans but difficult for robots. Unfortunately the very nature of the interactive task inherently excludes many people with disabilities, resulting in a denial of service to these users. Research findings also indicate that many popular CAPTCHA techniques are no longer particularly effective or secure, further complicating the challenge of providing services secured from robotic intrusion yet accessible to people with disabilities. This document examines a number of approaches that allow systems to test for human users and the extent to which these approaches adequately accommodate people with disabilities, including recent non-interactive and tokenized approaches. We have grouped these approaches by two category classifications: Stand-Alone Approaches that can be deployed on a web host without engaging the services of unrelated third parties and Multi-Party Approaches that engage the services of an unrelated third party.

Micha

PHP photo text authorization

PHP photo text authorization

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