Graphics: Cell CAPTCHA
Kevin Mat (contact me)
This class can be used to generate and validate CAPTCHA text that is created using shaded cells of a table and is stored in session variable.
The class renders simulated text by shading certain table cells that show the text in a given color and no actual image is generated.
It can also verify whether a text submitted by the user matches the CAPTCHA text. The verification can be case sensitive or insensitive.
Click here for detailed information about this class on phpclasses.org
Php Handleiding