Captcha using TTF & GD

[a_berezin]

v 2.5 23.03.2007 13:11
1. Remove "glob" function;
2. Add error messages constants;
3. Add session id to captcha_img.php href link;
4. Use direct output (no output buffer used);
5. The functions generateCaptcha(), createCaptchaImg() and showCaptchaImg() are incorporated in one function generateCaptcha();