Employment/Purpose

A captcha component can generate a special distortion image, also called a CAPTCHA (Completely Automated Public Turing test to tell Computers and Humans Apart) image. Developers could set heightand widthfor dimension of captcha. By default, captcha render the image with a randomly generated text, and developers can set valueto assign a purposive text.

Example

 <vbox>
     <captcha id="cpa" length="5" width="200px" height="50px"/>
 </vbox>

Supported Events

  • Inherited Supported Events: Image

Supported Children

*NONE

Troubleshooting

Linux

Captcha depends on Java Swing that might not work under some version of JVM. For the information to make it work under Linux, please refer to ZK Installation Guide: Linux.