WeChat パブリック アカウント開発に関する完全なチュートリアル 1

public function valid(){
//获取随机字符串
$echoStr = input("echostr");
if($echoStr){
// 验证接口的有效性，由于接口有效性的验证必定会传递echostr 参数
if($this ->checkSignature()){
echo $echoStr;
exit;
}
}else{
$this->responseMsg();
}
}
protected function checkSignature()
{
// 微信加密签名
$signature = input("signature");
$timestamp = input("timestamp");//时间戳
$nonce =input("nonce");//随机数
$token = "weixin";  //token值，必须和你设置的一样
$tmpArr =array($token,$timestamp,$nonce);
sort($tmpArr,SORT_STRING);
$tmpStr = implode($tmpArr);
$tmpStr =sha1($tmpStr);
if($tmpStr == $signature){
return true;
}else{
return false;
}
}

public function responseMsg()
{
        //get post data, May be due to the different environments
        $postStr = file_get_contents('php://input');    
  //extract post data
        if (!empty($postStr)){
/* libxml_disable_entity_loader is to prevent XML eXternal Entity Injection,
                   the best way is to check the validity of xml by yourself */
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;
}
}

f(!function_exists("http_curl")){
function http_curl($url,$data =array(),$method ="get",$returnType ="json")
{
//1.开启会话
$ch = curl_init();
//2.设置参数
curl_setopt($ch,CURLOPT_RETURNTRANSFER,TRUE);
curl_setopt($ch,CURLOPT_SSL_VERIFYPEER,false);
if($method!="get"){
curl_setopt($ch,CURLOPT_POST,TRUE);
curl_setopt($ch,CURLOPT_POSTFIELDS,$data);
}
curl_setopt($ch,CURLOPT_URL,$url);
//执行会话
$json = curl_exec($ch);
curl_close($ch);
if($returnType == "json"){
return json_decode($json,true);
}
return $json;
}
}
if(!function_exists('get_access_token')){
function get_access_token()
{
$appid = "wx1ba8f59d9e2c0be0"; //微信的appid
$secret ="9e65155599fb9ec047455e197ff6e121"; //微信的开发者密钥
// 读取缓存中的内容
include_once "MyMemcache.php";  //引入缓存方法文件
$obj = new \MyMemcache("47.104.71.253");
$value = $obj ->get($appid);
if(!$value){
$url = "https://api.weixin.qq.com/cgi-bin/token?grant_type=client_credential&appid=".$appid."&secret=".$secret;
$result = http_curl($url);
$value = $result['access_token'];
$obj->set($appid,$value,7000);
}
return $value;
}
}

class MyMemcache{
public $conn;
public $isMemcache =true;
public function __construct($host="127.0.0.1",$port='11211')
{
//  建立连接
if(class_exists('MyMemcache')){
$obj =new \Memcache();
}else{
$this ->isMemcache =false;
$obj =new \Memcached();
}
$obj ->addServer($host,$port);
$this ->conn =$obj;
}
//获取数据    
public function get($key)
{
return $this->conn->get($key);
}
//设置数据
public function set($key,$value,$expire=0)
{
if($this->isMemcache){
$this->conn->set($key,$value,0,$expire);
}else{
// Memcached扩展的操作方式
$this->conn->set($key,$value,$expire);
}
}
}