Php 呼叫重定向在plivo电话会议中不起作用

我已创建了一个会议，但呼叫重定向不起作用。 我的代码是第页

1.enter_conference.php

     <Response>
    <Conference callbackUrl="<?php echo $url; ?>conf_department_callback.php?conferenceid=<?php echo $currentday1; ?>&amp;Digits=<?php echo $digits; ?>"
                waitSound="<?php echo $url; ?>waitmusic.php" action="<?php echo $url; ?>call_end.php?ConferenceName=<?php echo $currentday1; ?>"
                redirect="false"  record="true" digitsMatch="0"><?php echo $currentday1; ?></Conference>
        <Response>

  $p = new RestAPI($auth_id, $auth_token);
  $params = array(
    'conference_name' => $conference, # ID of the call
 );
 $resp = $p->get_live_conference($params);
 foreach ($resp['response']['members'] as $num) {
    if ($num['direction'] == 'inbound') {
       $member_id = $num['member_id'];
       $parameters = array(
            'conference_name' => $conference, # ID of the call
            'member_id' => $member_id
        );
        $kickout = $p->kick_member($parameters);
    }
}

?>

<Response>
    <Redirect><?php  echo $url; ?>enter_conference.php?ConferenceDigitsMatch=<?php echo $ConferenceDigitsMatch;  ?></Redirect>
</Response>