问题
I working on a website which have function for sending SMS messages. What i know is the GSM modem use AT COMMAND to send/receive the message. I already have the modem but i can't find a way to sending the AT COMMAND from php script to the modem. Can someone give me a clear direction.
Many thanks.
来源：https://stackoverflow.com/questions/20990533/send-and-read-sms-through-a-gsm-modem-using-at-commands-from-websites