网站技术分析

代码演示:
<?php
//如果配置失败，可能是编码问题，加上这一句
header("Content-Type:text/plain;charset=utf-8");

//这里填写你的 token
$token="c75d4wfa98ce5986f2928962b771ehad";
define("TOKEN",$token);
$wechatObj = new wechatCallbackapiTest();
$wechatObj->valid();

class wechatCallbackapiTest
{
    /**验证*/
    public function valid() {
        $echoStr = $_GET["echostr"];
        if($this->checkSignature()) {
            echo $echoStr;exit;
        }
    }

    /**响应消息*/
    public function responseMsg() {
        $postStr = $GLOBALS["HTTP_RAW_POST_DATA"];
        if (!empty($postStr)) {
            libxml_disable_entity_loader(true);
            $postObj = simplexml_load_string($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 )) {
                $msgType = "text";
                $contentStr = "Welcome to wechat world!";
                $resultStr = sprintf($textTpl, $fromUsername, $toUsername, $time, $msgType, $contentStr);
                echo $resultStr;
            }else {
                echo "Input something...";
            }
        }else {
            echo "";exit;
        }
    }

    /**校验签名*/
    private function checkSignature() {
        // you must define TOKEN by yourself
        if (!defined("TOKEN")) {
            throw new Exception('TOKEN is not defined!');
        }
        $signature = $_GET["signature"];
        $timestamp = $_GET["timestamp"];
        $nonce = $_GET["nonce"];
        $token = TOKEN;
        $tmpArr = array($token, $timestamp, $nonce);
        sort($tmpArr, SORT_STRING);
        $tmpStr = implode( $tmpArr );
        $tmpStr = sha1( $tmpStr );
        if( $tmpStr == $signature ) {
            return true;
        }else {
            return false;
        }
    }
}
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