php calls SMS interface

Question

Why when php calls the SMS interface once, two messages will be sent.

Answer 1

First determine whether the interface you are calling is called more than once elsewhere

Secondly, SMS operators usually have a limit on the number of characters in a text message. For example, a text message is limited to 70 characters at most. You If the set number of characters exceeds 70, it will be sent in two text messages at one time