CAPTCHA has become a popular means of securing forms against automated submission, by requiring users to enter a string displayed in an automatically generated image.
This implementation uses Ajax to conveniently combine CAPTCHA into normal pre-submission form verification. You`ll need PHP to be installed with the GD image library (most PHP implementations will have this as standard).
FreeVersion: n/a Platform(s): All Updated:
July 16, 2008
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