This tutorial will show you how to make an image verification like they use (used?) on Yahoo or they still do on Planet Source Code. It is quite useful in order to prevent users from writing scripts that would do the voting, posting or whatever. Now, whenever a user wants to vote for something, he gets an image with a randomly generated string, that consists of uppercase and lowercase characters and numbers from 0 to 9. He then has to enter the string he sees on the picture and only if the code is correct, he will be allowed to proceed. I hope this code will help you.
File List:
doimg.php
2Kb
index.php
5Kb
verificate.php
1Kb
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