CAPTCHA

This is a simple captcha that generates an image based on a random string stored in a database. MySQL required.
Create the following SQL table:
CREATE TABLE captcha (
confirm_id char(32) DEFAULT '' NOT NULL,
session_id char(32) DEFAULT '' NOT NULL,
code char(8) DEFAULT '' NOT NULL,
PRIMARY KEY (session_id,confirm_id)
);
Modify the settings in the script.
This script uses TTF fonts to display the code. You can upload your own fonts to use. Just be sure to change $font_dir to wherever your fonts are stored. (A default font without rotation is used if none are available.)
There are two pages to this snippet. The first half is the captcha script. The second half is an example test page. Use the test page to understand how to implement the captcha.

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