<?php
/*
 * 此文件用于验证短信服务API接口，供开发时参考
 * 执行验证前请确保文件为utf-8编码，并替换相应参数为您自己的信息，并取消相关调用的注释
 * 建议验证前先执行Test.php验证PHP环境
 *
 * 2017/11/30
 */

class SignatureHelper {

    /**
     * 生成签名并发起请求
     *
     * @param $accessKeyId string AccessKeyId (https://ak-console.aliyun.com/)
     * @param $accessKeySecret string AccessKeySecret
     * @param $domain string API接口所在域名
     * @param $params array API具体参数
     * @return bool|\stdClass 返回API接口调用结果，当发生错误时返回false
     */
    public function request($accessKeyId, $accessKeySecret, $domain, $params) {
        $apiParams = array_merge(array (
            "SignatureMethod" => "HMAC-SHA1",
            "SignatureNonce" => uniqid(mt_rand(0,0xffff), true),
            "SignatureVersion" => "1.0",
            "AccessKeyId" => $accessKeyId,
            "Timestamp" => gmdate("Y-m-d\TH:i:s\Z"),
            "Format" => "JSON",
        ), $params);
        ksort($apiParams);

        $sortedQueryStringTmp = "";
        foreach ($apiParams as $key => $value) {
            $sortedQueryStringTmp .= "&" . $this->encode($key) . "=" . $this->encode($value);
        }

        $stringToSign = "GET&%2F&" . $this->encode(substr($sortedQueryStringTmp, 1));

        $sign = base64_encode(hash_hmac("sha1", $stringToSign, $accessKeySecret . "&",true));

        $signature = $this->encode($sign);

        $url = "http://{$domain}/?Signature={$signature}{$sortedQueryStringTmp}";

        try {
            $content = $this->fetchContent($url);
            return json_decode($content,true);
        } catch( \Exception $e) {
            return false;
        }
    }

    private function encode($str)
    {
        $res = urlencode($str);
        $res = preg_replace("/\+/", "%20", $res);
        $res = preg_replace("/\*/", "%2A", $res);
        $res = preg_replace("/%7E/", "~", $res);
        return $res;
    }

    private function fetchContent($url) {
        if(function_exists("curl_init")) {
            $ch = curl_init();
            curl_setopt($ch, CURLOPT_URL, $url);
            curl_setopt($ch, CURLOPT_TIMEOUT, 5);
            curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
            curl_setopt($ch, CURLOPT_HTTPHEADER, array(
                "x-sdk-client" => "php/2.0.0"
            ));
            $rtn = curl_exec($ch);

            if($rtn === false) {
                trigger_error("[CURL_" . curl_errno($ch) . "]: " . curl_error($ch), E_USER_ERROR);
            }
            curl_close($ch);

            return $rtn;
        }

        $context = stream_context_create(array(
            "http" => array(
                "method" => "GET",
                "header" => array("x-sdk-client: php/2.0.0"),
            )
        ));

        return file_get_contents($url, false, $context);
    }
}

/**
 * 发送短信
 * @param string keyid as AKid
 * @param string keysecret as  AKsecret
 * @param tel phonenumbers as 短信接收号码
 * @param string signname as 短信签名
 * @param string templatecode as 短信模板
 * @param array templateparam as 短信变量替换
 */
function sendSms($options = array()) {

    $params = array ();

    // *** 需用户填写部分 ***

    // fixme 必填: 请参阅 https://ak-console.aliyun.com/ 取得您的AK信息
    $accessKeyId = $options['keyid'];
    $accessKeySecret = $options['keysecret'];

    // fixme 必填: 短信接收号码
    $params["PhoneNumbers"] = $options['phonenumbers'];

    // fixme 必填: 短信签名，应严格按"签名名称"填写，请参考: https://dysms.console.aliyun.com/dysms.htm#/develop/sign
    $params["SignName"] = $options['signname'];

    // fixme 必填: 短信模板Code，应严格按"模板CODE"填写, 请参考: https://dysms.console.aliyun.com/dysms.htm#/develop/template
    $params["TemplateCode"] = $options['templatecode'];

    // fixme 可选: 设置模板参数, 假如模板中存在变量需要替换则为必填项
    $params['TemplateParam'] = $options['templateparam'];
    /*$params['TemplateParam'] = Array (
        "code" => $options['templateparam']['code'],
        "product" => $options['templateparam']['product']
    );*/

    // fixme 可选: 设置发送短信流水号
    //$params['OutId'] = "12345";

    // fixme 可选: 上行短信扩展码, 扩展码字段控制在7位或以下，无特殊需求用户请忽略此字段
    //$params['SmsUpExtendCode'] = "1234567";


    // *** 需用户填写部分结束, 以下代码若无必要无需更改 ***
    if(!empty($params["TemplateParam"]) && is_array($params["TemplateParam"])) {
        $params["TemplateParam"] = json_encode($params["TemplateParam"]);
    }

    // 初始化SignatureHelper实例用于设置参数，签名以及发送请求
    $helper = new SignatureHelper();

    // 此处可能会抛出异常，注意catch
    $content = $helper->request(
        $accessKeyId,
        $accessKeySecret,
        "dysmsapi.aliyuncs.com",
        array_merge($params, array(
            "RegionId" => "cn-hangzhou",
            "Action" => "SendSms",
            "Version" => "2017-05-25",
        ))
    );

    return $content;
}
/*
ini_set("display_errors", "on"); // 显示错误提示，仅用于测试时排查问题
set_time_limit(0); // 防止脚本超时，仅用于测试使用，生产环境请按实际情况设置
header("Content-Type: text/plain; charset=utf-8"); // 输出为utf-8的文本格式，仅用于测试

// 验证发送短信(SendSms)接口
print_r(sendSms());*/