twilio-client-twiml.php

<?php
require('Services/Twilio.php');

$number = "hoge";

// 画面から入力された電話番号の取得
if (isset($_REQUEST['To'])) {
  $number = $_REQUEST['To'];
}

// 発信先が番号かClient名かを判別し、発信先を設定する。
if (preg_match("/^[\d\+\-\(\) ]+$/", $number)) {
  $numberOrClient = "<Number>" . $number . "</Number>";
} elseif(stristr($number, "@")) {
  $numberOrClient = "<Sip>" . $number . "</Sip>";
} else {
  $numberOrClient = "<Client>" . $number . "</Client>";
}
?>

<Response>
  <Say language="ja-jp">Twilio Clientから電話をかけます。</Say>
  <Dial callerId="<?php echo $callerId ?>">
    <?php echo $numberOrClient; ?>
  </Dial>
</Response>