Twillo Shorcode Plugin

twilio-call.php

<?php
require('Services/Twilio.php');
function twilio_call(){
  $account_sid = "";
  $auth_token  = "";
  $from_num    = "+81";
  $to_num      = "+81";
  $twiml_url   = "";

  $client = new Services_Twilio($account_sid, $auth_token);

  $call = $client->account->calls->create(
    $from_num,
    $to_num,
    $twiml_url,
    array("method" => "POST"));
  echo $call->sid;
  print $response;
}

twilio_call();

twillo.php

<?php
/**
 * @package Twilio
 * @version 0.0
 */
/*
Plugin Name: Twilio
Plugin URI: https://jp.twilio.com/
Description: Twillo Sample.
Author: Hidetaka Okamoto
Version: 0.0
Author URI: http://wp-kyoto.net/
*/

add_shortcode('twilio-call', 'twilio_call_btn');
function twilio_call_btn($attr){
    extract(shortcode_atts(array(
        'class' => 'default-class',
        'text' => 'Call',
    ), $attr));

    $call_url = plugin_dir_url( __FILE__ ) ."twilio_call.php";

    $html = "<form action='{$call_url}' method='post' id='twilio-call-btn' class='{$class}'>";
    $html .= "<input type='submit' value='{$text}'></form>";
    return $html;
}