微信公众号新手接入

1，注册账号。步骤自己在网上找吧。我用的是测试号。

http://mp.weixin.qq.com/debug/cgi-bin/sandbox?t=sandbox/login

用手机扫描一下会得到一个账号，只能用一天。

2，配置接口信息。

Url这个是重点啊，所有的处理都在这。我的url是http://xxxx.cn/index.php

我用php开发的，index.php代码如下。

<?php
/**
  * wechat php test
  */

//define your token
define("TOKEN", "Mighty");
$wechatObj = new wechatCallbackapiTest();
if (isset($_GET['echostr'])) {
    $wechatObj->valid();
}else{
    $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>
                            <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;
        }
    }
        
    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;
        }
    }
}

?>

有不懂的看这个https://open.weixin.qq.com/cgi-bin/frame?t=resource/res_main_tmpl&verify=1&lang=zh_CN

3，找到你的测试号，比如我的测试号是gh_53f2959ea921。关注它。

给它发信息。返回“Welcome to wechat world!”的话就说明接入成功。

假如出问题了可以用测试接口测试。地址：https://mp.weixin.qq.com/debug/cgi-bin/apiinfo?t=index&type=%E6%B6%88%E6%81%AF%E6%8E%A5%E5%8F%A3%E8%B0%83%E8%AF%95&form=%E9%93%BE%E6%8E%A5%E6%B6%88%E6%81%AF