php_serial_class中的SendMessage函数

Question

I'm using php_serial_class and php to send SMS with a simple code like this:

                 $serial->sendMessage("AT+cmgf=1;+cnmi=2,1,0,1,0");
                 $serial->sendMessage("at+cmgs=\"$send_phone\"");
                 $serial->sendMessage("$message");
                 $serial->sendMessage(chr(26));

How if I wish to know the message is sent out or not?

I tried this but not working...if(!$serial->sendMessage())..

Is there any other ways?Thank you.

Answer 1

Thanks to mario.

I can use trim readPort() to get the response whether it's OK or ERROR.