php微信公众号开发（3）php实现简单微信文本通讯

微信开发前，需要设置token，这个是微信设置的，可以任意设置，用来实现微信通讯。这里有一个别人写的微信类，功能还比较不错。weixin.class.php代码如下

<?phpclass Weixin{ public $token = '';//token public $debug = false;//是否debug的状态标示，方便我们在调试的时候记录一些中间数据 public $setFlag = false; public $msgtype = 'text'; //('text','image','location') public $msg = array();  public function __construct($token,$debug) { $this->token = $token; $this->debug = $debug; }//获得用户发过来的消息（消息内容和消息类型 ） public function getMsg() { $postStr = $GLOBALS["HTTP_RAW_POST_DATA"];  if (!empty($postStr)) {  $this->msg = (array)simplexml_load_string($postStr, 'SimpleXMLElement', LIBXML_NOCDATA);  $this->msgtype = strtolower($this->msg['MsgType']); } }//回复文本消息 public function makeText($text='') { $CreateTime = time(); $FuncFlag = $this->setFlag ? 1 : 0; $textTpl = "<xml>  <ToUserName><![CDATA[{$this->msg['FromUserName']}]]></ToUserName>  <FromUserName><![CDATA[{$this->msg['ToUserName']}]]></FromUserName>  <CreateTime>{$CreateTime}</CreateTime>  <MsgType><![CDATA[text]]></MsgType>  <Content><![CDATA[%s]]></Content>  <FuncFlag>%s</FuncFlag>  </xml>"; return sprintf($textTpl,$text,$FuncFlag); } //根据数组参数回复图文消息 public function makeNews($newsData=array()) { $CreateTime = time(); $FuncFlag = $this->setFlag ? 1 : 0; $newTplHeader = "<xml>  <ToUserName><![CDATA[{$this->msg['FromUserName']}]]></ToUserName>  <FromUserName><![CDATA[{$this->msg['ToUserName']}]]></FromUserName>  <CreateTime>{$CreateTime}</CreateTime>  <MsgType><![CDATA[news]]></MsgType>  <Content><![CDATA[%s]]></Content>  <ArticleCount>%s</ArticleCount><Articles>"; $newTplItem = "<item>  <Title><![CDATA[%s]]></Title>  <Description><![CDATA[%s]]></Description>  <PicUrl><![CDATA[%s]]></PicUrl>  <Url><![CDATA[%s]]></Url>  </item>"; $newTplFoot = "</Articles>  <FuncFlag>%s</FuncFlag>  </xml>"; $Content = ''; $itemsCount = count($newsData['items']); $itemsCount = $itemsCount < 10 ? $itemsCount : 10;//微信公众平台图文回复的消息一次最多10条 if ($itemsCount) {  foreach ($newsData['items'] as $key => $item) {  if ($key<=9) {   $Content .= sprintf($newTplItem,$item['title'],$item['description'],$item['picurl'],$item['url']);  }  } } $header = sprintf($newTplHeader,$newsData['content'],$itemsCount); $footer = sprintf($newTplFoot,$FuncFlag); return $header . $Content . $footer; } public function reply($data) {  echo $data; } public function valid() { if ($this->checkSignature()) {  if( $_SERVER['REQUEST_METHOD']=='GET' )  {  echo $_GET['echostr'];  exit;  } }else{    exit; } } private function checkSignature() { $signature = $_GET["signature"]; $timestamp = $_GET["timestamp"]; $nonce = $_GET["nonce"];  $tmpArr = array($this->token, $timestamp, $nonce); sort($tmpArr); $tmpStr = implode( $tmpArr ); $tmpStr = sha1( $tmpStr );  if( $tmpStr == $signature ){  return true; }else{  return false; } } }?>