PHP如何比较arrays和activate函数

好的，我正在尝试用PHP创建一个动态的sms自动响应程序。现在，我有一个基本的可以响应单个单词输入的程序。请看这里：

<?php

/* Include twilio-php, the official Twilio PHP Helper Library,
 * which can be found at
 * http://www.twilio.com/docs/libraries
*/

include('Services/Twilio.php');

/* Controller: Match the keyword with the customized SMS reply. */
function index(){
    $response = new Services_Twilio_Twiml();
    $response->sms("Reply with one of the following keywords:
monkey, dog, pigeon, owl.");
    echo $response;
  }

function monkey(){
    $response = new Services_Twilio_Twiml();
    $response->sms("Monkey. A small to medium-sized primate that
typically has a long tail, most kinds of which live in trees in
tropical countries.");
    echo $response;
}

function dog(){
    $response = new Services_Twilio_Twiml();
    $response->sms("Dog. A domesticated carnivorous mammal that
typically has a long snout, an acute sense of smell, and a barking,
howling, or whining voice.");
    echo $response;
}

function pigeon(){
    $response = new Services_Twilio_Twiml();
    $response->sms("Pigeon. A stout seed- or fruit-eating bird with
a small head, short legs, and a cooing voice, typically having gray and
white plumage.");
    echo $response;
}

function owl(){
    $response = new Services_Twilio_Twiml();
    $response->sms("Owl. A nocturnal bird of prey with large
forward-facing eyes surrounded by facial disks, a hooked beak,
and typically a loud call.");
    echo $response;
}

/* Read the contents of the 'Body' field of the Request. */
$body = $_REQUEST['Body'];

/* Remove formatting from $body until it is just lowercase
 characters without punctuation or spaces. */
$result = preg_replace("/[^A-Za-z0-9]/u", " ", $body);
$result = trim($result);
$result = strtolower($result);

/* Router: Match the ‘Body’ field with index of keywords */
switch ($result) {
   case 'monkey':
        monkey();
        break;
    case 'dog':
        dog();
        break;
    case 'pigeon':
        pigeon();
        break;
    case 'owl':
        owl();
        break;

/* Optional: Add new routing logic above this line. */
    default:
        index();
}

---

array_intersect返回一个数组，看起来您将“testword”作为字符串。也许你可以尝试在数组中检查它与哪个关键字完全匹配

Ok，那么使用“in_array”函数，我将如何执行以下操作？：PHP应用程序需要检查字符串中的关键字“猫头鹰、鸽子、猴子、狗”，例如“那只狗花了多少钱？”或“你能告诉我关在笼子里的猴子的情况吗？”？，如果找到关键字匹配，则基于关键字运行函数。

/* Read the contents of the 'Body' field of the Request. */
 $body = $_REQUEST['Body'];

 /* Remove formatting from $body until it is just lowercase
characters without punctuation or spaces. */
 $result = rtrim($body, ", . ! ?");
 $result = strtolower($result);
 $result = explode(' ', $result);
 $keyword = array('dog', 'pigeon', 'owl', 'monkey');
 $testword = array_intersect($result, $keyword);
 print($testword);


/* Router: Match the ‘Body’ field with index of keywords */
switch ($testword) {
    case 'monkey':
        monkey();
        break;
    case 'dog':
        dog();
        break;
    case 'pigeon':
        pigeon();
        break;
    case 'owl':
        owl();
        break;

/* Optional: Add new routing logic above this line. */
    default:
    index();
}