What are the services for sending SMS through a PHP site?

Question

SMS

Hello!
What services do you know for sending SMS through a site to verify a mobile number?
If you used the SMS sending system, then I ask you for details)
Thank you!

Answer 1

Google not working? I use SMS center . There are ready-made libraries and an example of implementing a form for confirming a phone number.
There are also other methods that can be applied in your case:

• Voice mailings
  
• Sending codes to a phone number
  
• Receiving SMS messages or calls