Re: spam protection boxes

"Blue Presley" <blue928@carolina.rr.com> schrieb im Newsbeitrag news:5.1.1.6.0.20021024202123.00b224c0@pop-server.carolina.rr.com... > Yahoo and a couple other companies use boxes to help block spam. before > posting an ad on their classifieds, you see a box with word in it.. it's a > graphic. and you have to type the letters or words from the box into a > text box to proceed, and that ensures that a real person is at the > keyboard. anyone know how this can be accomplished in PHP? > > thx > > blue > i don't have a code for you but i think it would work like that... starting an randomizer with a couple of numbers for example... output the numbers by using the feature, that php can print text into images... and than recheck if the typed text is the same which was generated by the randomizer... hope it would help a little bit!? :)