第一步:填写服务器配置
登录微信公众平台官网后,在公众平台官网的开发-基本设置页面,勾选协议成为开发者,点击“修改配置”按钮,填写服务器地址(URL)、Token和EncodingAESKey,其中URL是开发者用来接收微信消息和事件的接口URL。Token可由开发者可以任意填写,用作生成签名(该Token会和接口URL中包含的Token进行比对,从而验证安全性)。EncodingAESKey由开发者手动填写或随机生成,将用作消息体加解密密钥。
第二步:验证消息是否来自微信服务器
参数 | 描述 |
---|---|
signature | 微信加密签名,signature结合了开发者填写的token参数和请求中的timestamp参数、nonce参数。 |
timestamp | 时间戳 |
nonce | 随机数 |
echostr | 随机字符串 |
代码如下:
<?php
/**
* wechat php test
*/
//define your token
define("TOKEN", "weixin");
$wechatObj = new wechatCallbackapiTest();
$wechatObj->run();
class wechatCallbackapiTest{
public function run(){
if ($this->checkSignature() == false) {
die('非法请求');
}
if (isset($_GET['echostr'])) {
$echoStr = $_GET['echostr'];
echo $echoStr;
exit;
}else{
$this->responseMsg();
}
}
public function responseMsg()
{
//get post data, May be due to the different environments
$postStr = $GLOBALS["HTTP_RAW_POST_DATA"];
// $postStr = file_get_contents("php://input");
file_put_contents('msg.txt', $postStr,FILE_APPEND);
//extract post data
if (!empty($postStr)){
$postObj = simplexml_load_string($postStr, 'SimpleXMLElement', LIBXML_NOCDATA);
$fromUsername = $postObj->FromUserName;
$toUsername = $postObj->ToUserName;
$keyword = trim($postObj->Content);
$time = time();
$textTpl = "<xml>
<ToUserName><![CDATA[%s]]></ToUserName>
<FromUserName><![CDATA[%s]]></FromUserName>
<CreateTime>%s</CreateTime>
<MsgType><![CDATA[%s]]></MsgType>
<Content><![CDATA[%s]]></Content>
<FuncFlag>0</FuncFlag>
</xml>";
if(!empty( $keyword ))
{
$contentStr = $this->hf($keyword);
$msgType = "text";
// $contentStr = "欢迎关注熊本生活!";
$resultStr = sprintf($textTpl, $fromUsername, $toUsername, $time, $msgType, $contentStr);
echo $resultStr;
}else{
echo "Input something...";
}
}else {
echo "";
exit;
}
}
public function hf($content)
{
if ($content == "天气") {
$contentStr = "有雨";
return $contentStr;
}elseif($content == "假期") {
$contentStr = "三天";
return $contentStr;
}else{
$contentStr = "Sorry...";
return $contentStr;
}
}
private function checkSignature()
{
$signature = $_GET["signature"];
$timestamp = $_GET["timestamp"];
$nonce = $_GET["nonce"];
$token = TOKEN;
$tmpArr = array($token, $timestamp, $nonce);
sort($tmpArr);
$tmpStr = implode( $tmpArr );
$tmpStr = sha1( $tmpStr );
if( $tmpStr == $signature ){
return true;
}else{
return false;
}
}
}