New full-featured conference calling sample

php/conference.php

@@ -0,0 +1,58 @@
+<?php
+// See http://bit.ly/confTutorial for a tutorial with this code.
+
+// An array of conference IDs and phone numbers to alert.
+// If a conference ID is used that has a phone number attached,
+// when someone joins or leaves that conference, the attached phone
+// number will get an SMS alerting them.
+$pins = array();
+$pins['1337'] = '14075551212';
+$pins['2600'] = '19255556789';
+$pins['1234'] = ''; // won't alert
+
+// If set to true, only known Conference IDs will be accepted
+$require_pin = false;
+
+$voice = 'kate';
+
+while ($currentCall->isActive) {
+  $response = ask('Enter your conference ID, followed by the pound key.', array(
+    'terminator' => '#',
+    'choices' => '[1-10 DIGITS]',
+    'timeout' => '3',
+    'mode' => 'keypad',
+    'voice' => $voice
+    ));
+  switch($response->name) {
+    case 'choice':
+      if ($require_pin && !array_key_exists($response->value, $pins)) {
+        // This conference only allows specific conference IDs, and the one
+        // entered isn't on the list.
+        say('Sorry, that is not a valid conference ID.', array('voice' => $voice));
+        break;
+      }
+      if (array_key_exists($response->value, $pins) && !empty($pins[$response->value])) {
+        // Send an alert that someone has entered the conference
+        message($currentCall->callerID . ' has entered conference ' . $response->value, array('to' => $pins[$response->value], 'network' => 'SMS'));
+      }
+      say('<speak>Conference ID <say-as interpret-as="vxml:digits">' . $response->value . '</say-as> accepted.</speak>', array('voice' => $voice));
+      say('You will now be placed into the conference. Please announce yourself. To exit the conference without disconnecting, press pound.', array('voice' => $voice));
+      conference($response->value, array('terminator' => '#'));
+      say('You have left the conference.', array('voice' => $voice));
+      if (array_key_exists($response->value, $pins) && !empty($pins[$response->value])) {
+        // Send an alert that someone has entered the conference
+        message($currentCall->callerID . ' has left conference ' . $response->value, array('to' => $pins[$response->value], 'network' => 'SMS'));
+      }
+      // Pause a moment before asking for another conference.
+      sleep(1);
+      break;
+    case 'badChoice':
+      say('Sorry, that is not a valid conference ID.', array('voice' => $voice));
+      break;
+    case 'silenceTimeout':
+    case 'timeout':
+      say('Sorry, I didn\'t hear anything.', array('voice' => $voice));
+      break;
+  }
+}
+?>