event.php

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<?php

// Vonage sends a JSON payload to your event endpoint, so read and decode it
$request = json_decode(file_get_contents('php://input'), true);
//$request = $_REQUEST;
echo '<pre>';
	print_r($request);
echo '</pre>';
// Work with the call status
if (isset($request['status'])) {
    switch ($request['status']) {
    case 'ringing':
        record_steps("UUID: {$request['conversation_uuid']} - ringing.");
        break;
    case 'answered':
        
        $arrData = '{
                "to":[{"type": "phone","number": "918758607477"}],
                "from": {"type": "phone","number": "918866897945"},
                "answer_url": ["https://hogsandbbqs.co.uk/calltest/answer-2.json"],
                "machine_detection":"continue"
            }';
        $sendSMS = sendSMS('https://api.nexmo.com/v1/calls', $arrData);

$sendSMSArr = json_decode($sendSMS, true);
		
		echo '<pre>';
			print_r($sendSMSArr);
		echo '</pre>';

break;
    case 'complete':
        record_steps("UUID: {$request['conversation_uuid']} - complete.");
        break;
    default:
        break;
    }
}

function record_steps($message) {
    file_put_contents('./call_log.txt', $message.PHP_EOL, FILE_APPEND | LOCK_EX);
}

function sendSMS($url, $jsonData) {
    
    $token = 'eyJ0eXAiOiJKV1QiLCJhbGciOiJSUzI1NiJ9.eyJpYXQiOjE2MjIyMjkyMzAsImV4cCI6MTYyMjI1MDgzMCwianRpIjoiSUNmQzdWWHp3bUs1IiwiYXBwbGljYXRpb25faWQiOiJiYzVjMzQ2Mi0zODgxLTQ0NzItYWFjNi0wYzkzOGZlMmMyYWYifQ.tjafXEXjVF9_IYt3paWqBtllIEdGv8OjdnWGuwByBwrjONBs1gU1xVQI2nN9upL5vWYD-20cnAg9nDaYrQaLB47-4Tnw_X12r3Ys0DlNcZy8pE3Vv8V2bdK-4UVVt_6FdrlI9TnMP3klJBGs7VX8WZZLKIRy3ulheGybJPmA2VB-nSpGCBgYtODd22U-roXSbsW78RXTSZAvIMTd9lEDaA5MYcaSH9yzAaGU-n397B6IAUsFK1NxIPpQ5_Zl5yRVZHgY_MX5yJu8tsQC-9HCvrs64c2S0OG_iC6fVONK1eWA7aL-4HfKSb_DZm-R2WtEkrqgQjiNEX65VyHt_d527w';
    
    try {
        $curl = curl_init();

curl_setopt_array($curl, array(
          CURLOPT_URL => $url,
          CURLOPT_RETURNTRANSFER => true,
          CURLOPT_ENCODING => '',
          CURLOPT_MAXREDIRS => 10,
          CURLOPT_TIMEOUT => 0,
          CURLOPT_FOLLOWLOCATION => true,
          CURLOPT_HTTP_VERSION => CURL_HTTP_VERSION_1_1,
          CURLOPT_CUSTOMREQUEST => 'POST',
          CURLOPT_POSTFIELDS => $jsonData,
          CURLOPT_HTTPHEADER => array(
            'Content-Type: application/json',
            'Authorization: Bearer '.$token
          ),
        ));

$response = curl_exec($curl);

curl_close($curl);
    }
    catch(Exception $e){
        throw new Exception("Invalid URL",0,$e);
    }
    return $response;
}
?>