Email verification

Hi,I need an email verification code and a little guidance.

please expand…

what kind of email verification are you talking about?

i have that code:-https://drive.google.com/file/d/198eUy8Fl2jyGDpVOIVkBZQlyVRF0sA0A/view

error :-

Mailer Error: SMTP connect() failed. https://github.com/PHPMailer/PHPMailer/wiki/Troubleshooting