From: "PEAR Announce" on
The new PEAR package Services_ReCaptcha-1.0.0 (stable) has been released at

Release notes
* fixed 2 tests that failed when running tests against the live server,
* make sure explode() splits the validate response in two tokens only,
* Services_ReCaptcha has now documentation in docbook format.

Package Info
Services_ReCaptcha is a PHP5 interface to the two services offered by
recaptcha: reCAPTCHA and reCAPTCHA Mailhide.

reCAPTCHA is a freely available CAPTCHA implementation. It distinguishes
humans from computers.
To use reCAPTCHA, you will need a public/private API key pair, available here:

reCAPTCHA Mailhide helps you protect your inbox by asking people to solve a
reCAPTCHA before they can view your email address.
The reCAPTCHA can only be solved by humans, so this stops spammers from gaining
access to your email address through automated programs.
reCAPTCHA Mailhide requires the mcrypt php extension and you will also need a
public and a private API key, that can be generated here:

Related Links
Package home:

David Jean Louis (lead)