微信公众号搭建php代码

<?php

//获取微信公众平台的请求参数
function getToken() {
  $token = "yourtoken"; //此处输入你的token值
  $timestamp = $_GET["timestamp"];
  $nonce = $_GET["nonce"];
  $signature = $_GET["signature"];
  $echostr = $_GET["echostr"];
  
  $arr = array($timestamp, $nonce, $token);
  sort($arr, SORT_STRING);
  $str = implode($arr);
  $str = sha1($str);
  
  if($str == $signature) {
    echo $echostr;
  }
}

//验证请求是否合法
function checkSignature() {
  $token = "yourtoken";
  $signature = $_GET["signature"];
  $timestamp = $_GET["timestamp"];
  $nonce = $_GET["nonce"];

  $arr = array($token, $timestamp, $nonce);
  sort($arr);
  $str = sha1(implode($arr));

  if ($str == $signature) {
    return true;
  } else {
    return false;
  }
}

//消息回复函数
function responseMsg() {
  //获取微信公众平台POST过来的数据
  $postStr = $GLOBALS["HTTP_RAW_POST_DATA"];
  
  if (!empty($postStr)) {
    //解析POST过来的XML数据包
    $postObj = simplexml_load_string($postStr, 'SimpleXMLElement', LIBXML_NOCDATA);
    $fromUsername = $postObj->FromUserName;
    $toUsername = $postObj->ToUserName;
    $keyword = trim($postObj->Content);
    $time = time();
    
    //定义消息类型
    $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)) {
      $contentStr = "Welcome ".$fromUsername." to our site!";
      $msgType = "text";
      $resultStr = sprintf($textTpl, $fromUsername, $toUsername, $time, $msgType, $contentStr);
      echo $resultStr;
    } else {
      echo "Input something...";
    }
  
  } else {
    echo "";
    exit;
  }
}

//主函数
if (checkSignature()) {
  if (isset($_GET['echostr'])) {
    getToken();
    exit;
  } else {
    responseMsg();
  }
} else {
  echo "";
  exit;
}

?>