In this post, I will be discussing about how to send SMS through PHP using Nexmo SMS API. To send SMS, we will be using Nexmo SMS API. There are a number of SMS Gateways like Clickatell, Twilio, and so on available in the market. However, I found Nexmo to be very reliable, well Documented & cheaper.

Define Nexmo API Key:

// Nexmo api keys
define('NEXMO_API_KEY', 'XXXXXXXX');
define('NEXMO_API_SECRET', 'XXXXXXXX');

I made a global function to send sms through nexmo sms api; here is the code

   /**
     * Send a text message.
     *
     * @access protected
     *
     * @param string $cellNumber
     * @param string $message   
     * @return void
     */
    public function nexmoSendMessage($cellNumber = null, $message = null)
    {
        try {
            // Step 1: Declare new NexmoMessage.
            $nexmo_sms = new NexmoMessage(NEXMO_API_KEY, NEXMO_API_SECRET);

            // Step 2: Use sendText( $to, $from, $message ) method to send a message. 
            $info = $nexmo_sms->sendText($cellNumber, 'MyApplication', $message);

            // Step 3: Display an overview of the message
            $nexmo_sms->displayOverview($info);
        } catch(Exception $e) {
           echo $e->getMessage();
        }
    }

Example: Lets say, you want to send an SMS to all user about the health tips.

nexmoSendMessage('+1 9876543210', 'Turn off the TV or computer, and get at least 30 minutes of exercise every day.');