test.php

<?php

include('class.sniffer.php');

$user_agent = $_SERVER['HTTP_USER_AGENT'];

try {
	$sniffy = new sniffer($user_agent);
	$channel_type = $sniffy->getChannelType();
}

catch (badSnifferException $ex) {
	die($ex->getMessage());
}

echo '<?xml version="1.0" encoding="utf-8"?>';

?>

<vxml version="2.1">
<form id="F_1">

<catch event="noinput">
 <if cond="channelType == 'sms'">
  <log>*** Do not reprompt if SMS. ***</log>
 <else/>
  <reprompt/>
 </if>
</catch>

<catch event="noinput" count="3">
 <prompt cond="channelType != 'sms'">
 	Sorry you are having trouble. Please try your call again later. Goodbye.
 </prompt>
 <prompt cond="channelType == 'sms'">
 	No response received. Goodbye.
 </prompt>
 <exit/>
</catch>

<var name="channelType" expr="'<?php echo $channel_type; ?>'"/>

<field name="zip" type="digits?length=5">
  <prompt>Enter your zip code.</prompt>
</field>

<field name="confirm" type="boolean?y=1" cond="channelType != 'sms'">
 <prompt>
 	You entered 
 		<say-as interpret-as="number" format="digits">
 			<value expr="zip"/>
 		</say-as>. 
 	Is this correct? Enter 1 for yes, 2 for no.
 </prompt>
 <filled> 
   <if cond="!confirm">
   <prompt>Lets try again.</prompt>
   <clear/>
   </if>
 </filled>
</field>

<block>
 <prompt>
 	You entered 
 		<say-as interpret-as="number" format="digits">
 			<value expr="zip"/>
 		</say-as>.
 </prompt>
 <exit/>
</block>

</form>
</vxml>