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Solmetra FormValidator

Rated3.7/5 (94 ratings)
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PHP class used to validate web forms against automated submissions using randomly distorted image.
Product Details

SOLMETRA FormValidator is a PHP class used to validate web forms against automated submissions. The process involves generating and displaying a distorted image of secret phrase which is readable to humans but completely incomprehendable to machines - even to OCR programs. This protection mechanism is known as CAPTCHA (completely automated public Turing test to tell computers and humans apart).

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Submitted on
21st December 2005
Last Updated
11th February 2009
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License Price
EUR 10
Additional Info
License for non-GPL compatible use

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User Reviews

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(94 ratings)
Average User Rating: 3.7/5
Perfect. This is the CAPTCHA you'll want
Reviewed byAnonymousonFri, 10th February 2006
Rating 5 - Excellent
PHP with GD support required. I plugged in a half-dozen CAPTCHAs but SOLMETRA worked instantly right out of the box. I selected my own background grid and added my own fonts and resized the image -- all very easily done. The image uses random type faces twisted at random angles to thwart robotic readings. You REALLY need a Turing Test on your feedback and contact-me forms to help avoid email header injection attacks. Solmetra is the one I like best. It's the one I use in my form2mail program.
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