如何在PHP中实现短信发送功能

<?php
// 引入阿里云SDK
require_once './aliyun-php-sdk-core/Config.php';
use DysmsapiRequestV20170525 as Dysmsapi20170525Request;

// 配置API接口信息
$accessKeyId = "your_access_key_id";
$accessKeySecret = "your_access_key_secret";
$appkey = "your_app_key";
$signName = "your_sign_name";
$templateCode = "your_template_code";
$phoneNumbers = "your_phone_number";
$templateParam = array("code" => "123456");

// 调用API接口发送短信
$iClientProfile = DefaultProfile::getProfile("cn-hangzhou", $accessKeyId, $accessKeySecret);
$client = new DefaultAcsClient($iClientProfile);
$request = new Dysmsapi20170525RequestSendSmsRequest();
$request->setPhoneNumbers($phoneNumbers);
$request->setSignName($signName);
$request->setTemplateCode($templateCode);
$request->setTemplateParam(JSON_encode($templateParam));
$response = $client->getAcsResponse($request);

// 输出发送结果
print_r($response);
?>