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发布时间：2015年1月22日 作者：未知 查看次数：1890

微信公众平台初始用

今天测试微信php自动回复功能，从微信开发者文档下载的wx_sample.php修改后却始终不能成功执行，代码如下：
----------------------------------------------------

<?php

/**

  * wechat php test

  */

 

//define your token

define("TOKEN", "weixin2015");

$wechatObj = new wechatCallbackapiTest();

//$wechatObj->valid();

$wechatObj->responseMsg();

 

class wechatCallbackapiTest

{

 public function valid()

    {

        $echoStr = $_GET["echostr"];

 

        //valid signature , option

        if($this->checkSignature()){

         echo $echoStr;

         exit;

        }

    }

 

    public function responseMsg()

    {

  //get post data, May be due to the different environments

  $postStr = $GLOBALS["HTTP_RAW_POST_DATA"];

 

       //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>

 

    if(!empty( $keyword ))

                {

                $msgType = "text";

                 $contentStr = "Welcome to wechat world!";

                 $resultStr = sprintf($textTpl, $fromUsername, $toUsername, $time, $msgType, $contentStr);

                 echo $resultStr;

          exit;

                }else{

                 echo "Input something...";

                }

 

        }else {

         echo "";

         exit;

        }

    }

  

 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);

        // use SORT_STRING rule

  sort($tmpArr, SORT_STRING);

  $tmpStr = implode( $tmpArr );

  $tmpStr = sha1( $tmpStr );

  

  if( $tmpStr == $signature ){

   return true;

  }else{

   return false;

  }

 }

}

 

?>

----------------------------------------------------
后在百度搜索找到一段代码终于成功得到回复。代码如下（修改）：

----------------------------------------------------
<?php
/**
  * wechat php test
  */
//define your token
define("TOKEN", "weixin2015");
$wechatObj = new wechatCallbackapiTest();
$wechatObj->responseMsg();

class wechatCallbackapiTest
{
    public function valid()
    {
        $echoStr = $_GET["echostr"];

        //valid signature , option
        if($this->checkSignature()){
            echo $echoStr;
            exit;
        }
    }

    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)){
               
                  $postObj = simplexml_load_string($postStr, 'SimpleXMLElement', LIBXML_NOCDATA);
                $fromUsername = $postObj->FromUserName;
                $toUsername = $postObj->ToUserName;
                $keyword = $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 = "欢迎访问!你的id是" . $toUsername;
                    $resultStr = sprintf($textTpl, $fromUsername, $toUsername, $time, $msgType, $contentStr);
                    echo $resultStr;
                }else{
                    echo "Input something...";
                }

        }else {
            echo "";
            exit;
        }
    }
       
    private function checkSignature()
    {
        $signature = $_GET["signature"];
        $timestamp = $_GET["timestamp"];
        $nonce = $_GET["nonce"];   
               
        $token = TOKEN;
        $tmpArr = array($token, $timestamp, $nonce);
        sort($tmpArr);
        $tmpStr = implode( $tmpArr );
        $tmpStr = sha1( $tmpStr );
       
        if( $tmpStr == $signature ){
            return true;
        }else{
            return false;
        }
    }
}

?>
----------------------------------------------------

可发现回复的中文却是乱码。
搜索查找原因才知要保存的php文件为utf-8编码(php好像没要求是utf-8编码，非utf-8编码也正常)。用系统自带记事本转换上传后，终于正确了。

file_get_contents("php://input")和$GLOBALS["HTTP_RAW_POST_DATA"]的区别吗？

----------------------------------------------------

http://blog.csdn.net/molaifeng/article/details/40107813

最近在开发微信接口，又学到了一些新的技术点，今天就把学到的关于接收数据的技术点给简单的罗列下。

public function __construct($token, $wxuser = ''){
        $this -> auth($token, $wxuser) || exit;
        if(IS_GET){
            echo($_GET['echostr']);
            exit;
        }else{
            $xml = file_get_contents("php://input");
            $xml = new SimpleXMLElement($xml);
            $xml || exit;
            foreach ($xml as $key => $value){
                $this -> data[$key] = strval($value);
            }
        }
    }

 

上述代码是截取的一个片段，意思为把接收到的微信传过来的xml解析为数组。其中有一处file_get_contents('php://input')，后经查证，微信给开发者账号填写的url发送的是xml数据，但PHP默认只识别application/x-www.form-urlencoded标准的数据类型，对text/xml的内容无法解析为$_POST数组，因此会保留原型，可以交给file_get_contents(‘php://input’)接收，也可以用$GLOBALS['HTTP_RAW_POST_DATA']。

如，传过来的xml为

<xml>
<ToUserName><![CDATA[ebyben1413005325]]></ToUserName>
<FromUserName><![CDATA[ga_6281708af4c6]]></FromUserName>
<CreateTime>1413341614</CreateTime>
<MsgType><![CDATA[text]]></MsgType>
<Content><![CDATA[首页]]></Content>
<MsgId>1234567890123456</MsgId>

解析过后为

Array
(
    [ToUserName] => ebyben1413005325
    [FromUserName] => ga_6281708af4c6
    [CreateTime] => 1413341614
    [MsgType] => text
    [Content] => 首页
    [MsgId] => 1234567890123456
)

 

php://input 允许读取 POST 的原始数据。和 $HTTP_RAW_POST_DATA 比起来，它给内存带来的压力较小，并且不需要任何特殊的 php.ini 设置。同时两者皆不能用于接收enctype="multipart/form-data"形式的数据。

最后再说下$_SERVER['REQUEST_METHOD']这个变量，用过ThinkPHP的朋友应该在代码中使用类似IS_GET、IS_AJAX这种代码吧，追溯下源码，就可以看到

define('REQUEST_METHOD',$_SERVER['REQUEST_METHOD']);
define('IS_GET',        REQUEST_METHOD =='GET' ? true : false);
define('IS_POST',       REQUEST_METHOD =='POST' ? true : false);
define('IS_PUT',        REQUEST_METHOD =='PUT' ? true : false);
define('IS_DELETE',     REQUEST_METHOD =='DELETE' ? true : false);
define('IS_AJAX',       ((isset($_SERVER['HTTP_X_REQUESTED_WITH']) && strtolower($_SERVER['HTTP_X_REQUESTED_WITH']) == 'xmlhttprequest') || !empty($_POST[C('VAR_AJAX_SUBMIT')]) || !empty($_GET[C('VAR_AJAX_SUBMIT')])) ? true : false);

原来仅仅就用了这个变量，就达到效果。