Another CAPTCHA project
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This package can be used to perform human user validation using CAPTCHA images (Completely Automated Public Turing to tell Computers from Humans Apart).
It generates a sequence of animated images, assembled with in a GIF animation file, to make it more difficult to break by robots because the validation text does not completely appear in each of the animation images.
The text length, color and font are configurable.
It generates a sequence of animated images, assembled with in a GIF animation file, to make it more difficult to break by robots because the validation text does not completely appear in each of the animation images.
The text length, color and font are configurable.
| Classes of László Zsidi | > | Another CAPTCHA project | > | Download .zip .tar.gz | > |  Support forum (5) |
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Graphics | Colors, images, charts and picture formats | View top rated classes |
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Validation | Validation algorithms | View top rated classes |
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Security | Security protection and attack detection | View top rated classes |
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| Innovation Award | ||
 October 2006 Winner |
CAPTCHA validation has become a widely adopted method to prevent that people use robot scripts to abuse from Web site content or services. It uses images with fuzzy text to make it more difficult for robots that attempt to automatically read the text that is written. Meanwhile, several techniques have been developed to discover the text in the CAPTCHA validation images. This class provides a more advanced solution that employs animated images to render the verification text. It raises the bar in terms of the difficulty that it imposes to robots, as the actual text is never completely displayed in each of the animated image frames. Manuel Lemos |
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| Packages needed by this class | ||
| Class | Dependency | Why it is needed |
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| GIF images into animated GIF with native PHP class | Generating single animation |
| Trackback links | ||
| Link | Description |
|---|---|
| Animated CAPTCHA in PHP | Found an easy way to create animated CAPTCHAs in PHP... |
| Animierte CAPTCHAS? Ein Ungar macht es möglich: Another CAPTCHA project | CAPTCHAS gibt es ja überall, und darunter gibt es wiederum schöne und weniger schöne... |
| Applications that use this class | ||
No application links were specified for this class.
If you know an application of this package, send a message to the author to add a link here.| Related links | ||
| Link | Description |
|---|---|
| Demo pages | CAPTCHA 2 demo page |
| Demo pages | CAPTCHA 3 demo page |
| Demo pages | CAPTCHA 4 demo page |
| Donate Page | Donate to development |
| Download page | Download originaly tested and packed CAPTCHA generators |
| Files |
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| File | Role | Description | ||
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| captcha (1 file) |
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| fonts (1 file) |
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| Captcha.class.php |
Class | animated CAPTCHA creator class | ||
| captcha.php |
Example | CAPTCHA image resource file | ||
| Captcha2.class.php |
Class | Captcha.class.php - Volume 2 | ||
| index.php |
Example | Example index file | ||
| Download all files: animated_captcha.tar.gz animated_captcha.zip |
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