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Zend Framework: Zend_Captcha Component Proposal

Proposed Component Name Zend_Captcha
Developer Notes http://framework.zend.com/wiki/display/ZFDEV/Zend_Captcha
Proposers Steven Brown
Revision 0.1 - 8 January 2008: Created. (wiki revision: 5)

Table of Contents

1. Overview

Zend_Captcha is designed to allow developers to quickly and easily implement captchas. While there should be several options so that developers can customise their captchas there should be a good default standard that is improved as advancements are made.

Audio captchas should be an option down the track.

2. References

3. Component Requirements, Constraints, and Acceptance Criteria

  • This component will provide a means for developers to implement captcha.
  • This component will default to the most "secure" captcha preferences.
  • This component will allow developers to customise the captcha.

4. Dependencies on Other Framework Components

  • Zend_Exception

5. Theory of Operation

The captcha image can be created as an object and output to the browser from an action. The captcha answer will be stored in a session namespace (or maybe custom storage options are allowed with a reference ID). Entered data can be compared against the captcha answer.

6. Milestones / Tasks

  • Milestone 1: Definition.
  • Milestone 2: Working prototype.
  • Milestone 3: Unit tests exist, work, and are checked into SVN.
  • Milestone 4: Initial documentation exists.

7. Class Index

  • Zend_Captcha_Exception
  • Zend_Captcha (factory class)

8. Use Cases

9. Class Skeletons

Zend_Captcha

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