5 Captcha Types
- Google reCAPTCHA v2 — “I’m not a robot” checkbox
- Google reCAPTCHA v3 — Invisible score-based verification
- Alikon Image Captcha — PHP GD-generated distorted text image
- Captcha Form — Math-based challenge (addition)
- SecurImage — PHP-based image captcha with custom fonts
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Add screenshot: screenshots/5-captcha-types.png
5 Captcha Types