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).

Current release:

SOLMETRA FormValidator v1.01 (download here - ZIP 82 KB)

Features of the current release:

• Easy to set up and use - works straight "out of the box" - no configuration required;
• Can randomly use any number of custom backgrounds (there are 12 different backgrounds included in the package);
• Automatically adjusts for the size of the background;
• Can use any number of TTF fonts (4 custom fonts included in package);
• Each letter is altered individually by randomizing used font, angle, position and color;
• Customizable: fonts and font sizes, text and shadow colors, character sets;
• Variable length strings - class stretches the phrase to gracefully fit across the background;
• Automatic image format recognition (GIF, JPEG and PNG files are supported);
• Uses PHP session to store user tags and generates images on the fly. No files are saved to disk.
• Option to track users without the usage of PHP sessions

Requirements:

• Server: PHP 4.1.0 or later on any compatible OS with GD and FreeType support enabled
• Client: Any web browser with cookie support

Sample output:

(Refresh this page to regenerate code image)