问题
I am hoping to use Google's free reCAPTCHA service on a web form.
https://developers.google.com/recaptcha/docs/display
However, I don't want the distorted letters or words to show in recaptcha images. I feel these distorted letters give visitors too much frustration, and I did read negative comments about using distorted words as the challenge. So I hope that only digits show up in recaptcha images.
Is this something developers like us can configure and control? I googled and did not find anything I want.
Thanks and regards.
回答1:
To my knowledge, there is no way to configure this. Google will decide how it wants to verify the user. Sometimes, no input is required, the user just checks the box. Other times, digits or letters are required to be typed.
来源：https://stackoverflow.com/questions/27323863/google-recaptcha-show-only-digits-in-recaptcha-image