abstract Twiml class.php

<?php

use Twilio\Twiml; 

class TwimlWrap
{ 
  /** @var TwilioTwiml */ 
  protected $twiml;

  public function __construct() 
  { 
    $this->twiml = new Twiml(); 
  }

  public function say($message, array $attributes = []) 
  { 
    $this->twiml->say($message, $attributes); 
  }

  public function gather($verb, $noun, $gatherOptions = [], $verbOptions = []) 
  { 
    $gather = $this->twiml->gather($gatherOptions);

    $gather->$verb($noun, $verbOptions);
  } 

  public function renderTwiml()
  {
      print $this->twiml;
  }

}

// Instantiate the TwimlWrap class and pass in necessary paramaters for Gather.
$foo = new TwimlWrap();
$foo->gather("Say","Hello World!", ['input' => 'speech dtmf', 'timeout' => 3,
    'numDigits' => 1], ['voice' => 'woman', 'language' => 'fr'] );

// Outputs Twiml.
$foo->renderTwiml();

/* This is what the Twiml output looks like:
<?xml version="1.0" encoding="UTF-8"?>
<Response>
  <Gather input="speech dtmf" timeout="3" numDigits="1">
    <Say voice="woman" language="fr">Hello World!</Say>
  </Gather>
</Response>
*/