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Example code of jublonet/catcha

Informations about the package catcha

catcha

Catch-a spammer with a CAPTCHA.

Copyright (C) 2013-2014 Jublo IT Solutions <[email protected]>

This program is free software: you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any later version.

This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.

You should have received a copy of the GNU General Public License along with this program. If not, see http://www.gnu.org/licenses/.

Please enable the GD extension in your PHP environment.

Getting started

  1. Generate a challenge

  2. Store the Catcha object

  3. After the user enters the solution, restore the object

  4. Check if the entered result was correct

Adapting to your needs

Set a custom challenge canvas image size

The canvas size defaults to 100 x 25 pixels. Customize the size:

Use a custom font

By default, Catcha uses the Averia Light font licensed under the SIL Open Font License Version 1.1 (http://scripts.sil.org/OFL). You may as well use a custom True Type font (*.ttf):

Paint the canvas in a different color

The supported color codes include (upper- and lower case)

Write the equation in a different color

Generate a new challenge and discard the old one

Get raw image data without sending to browser

The raw image data are in binary JPEG format, quality 80.

All versions of catcha with dependencies

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