详解php微信小程序消息推送配置

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<?php
    printLog(json_encode($_GET));
      $signature = $_GET["signature"];
        $timestamp = $_GET["timestamp"];
        $nonce = $_GET["nonce"];
        $echostr = $_GET["echostr"];
        $token = "medisum";
        $tmpArr = array($token, $timestamp, $nonce);
        sort($tmpArr, SORT_STRING);
        $tmpStr = implode( $tmpArr );
        $tmpStr = sha1( $tmpStr );
        printLog("tmpStr:".$tmpStr);
        printLog("signature:".$signature);
        if( $tmpStr == $signature ){
            echo  $echostr;
        }else{
            echo  false;
        }
        /**
         * 打印数据
         * @param  string $txt  日志记录
         * @param  string $file 日志目录
         * @return 
         */
        function printLog($txt="",$file="ceshi.log"){
          $myfile = fopen($file, "a+");
          $StringTxt = "[".date("Y-m-d H:i:s")."]".$txt."n";
          fwrite($myfile, $StringTxt);
          fclose($myfile);
        }
?>