How to send OTP sms in php using sms gateway from localhost or any live server

Sir can you please provide your email id or something I really need help I run your code from your website sending email otp verification and it was working properly then suddenly it stops sending emails just showing email send successfully please help vidur sir. I am trying to solve this from many days it's very important for my project please help sir

how to create sender template

Thanks. How to create Sender template?