基本信息

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   源码介绍

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微信抽奖插件，这个源码比较全面，完整可用，从网上找了很多，这个完整可用，很实用

<?php

class ThinkWechat {

/**
* 微信推送过来的数据或响应数据
* @var array
*/
private $data = array();

/**
* 主动发送的数据
* @var array
*/
private $send = array();

/**
* 获取微信推送的数据
* @return array 转换为数组后的数据
*/
public function request(){
$this->auth() || exit;

if(IS_GET){
exit($_GET['echostr']);
} else {
$xml = file_get_contents("php://input");
$xml = new SimpleXMLElement($xml);
$xml || exit;

foreach ($xml as $key => $value) {
$this->data[$key] = strval($value);
}
}
       	return $this->data;
}

/**
* * 被动响应微信发送的信息（自动回复）
* @param  string $to      接收用户名
* @param  string $from    发送者用户名
* @param  array  $content 回复信息，文本信息为string类型
* @param  string $type    消息类型
* @param  string $flag    是否新标刚接受到的信息
* @return string          XML字符串
*/
public function response($content, $type = 'text', $flag = 0){
/* 基础数据 */
$this->data = array(
'ToUserName'   => $this->data['FromUserName'],
'FromUserName' => $this->data['ToUserName'],
'CreateTime'   => NOW_TIME,
'MsgType'      => $type,
);

/* 添加类型数据 */
$this->$type($content);

/* 添加状态 */
$this->data['FuncFlag'] = $flag;

/* 转换数据为XML */
$xml = new SimpleXMLElement('<xml></xml>');
$this->data2xml($xml, $this->data);
exit($xml->asXML());
}

/**
* * 主动发送消息
*
* @param string $content   内容
* @param string $openid   发送者用户名
* @param string $type   类型
* @return array 返回的信息
*/

public function sendMsg($content, $openid = '', $type = 'text') {
/* 基础数据 */
$this->send ['touser'] = $openid;
$this->send ['msgtype'] = $type;

/* 添加类型数据 */
$sendtype = 'send' . $type;
$this->$sendtype ( $content );

/* 发送 */
$sendjson = jsencode ( $this->send );
$restr = $this->send ( $sendjson );
return $restr;
}

/**
* 发送文本消息
* 
* @param string $content
*        	要发送的信息
*/
private function sendtext($content) {
$this->send ['text'] = array (
'content' => $content 
);
}

/**
* 发送图片消息
* 
* @param string $content
*        	要发送的信息
*/
private function sendimage($content) {
$this->send ['image'] = array (
'media_id' => $content 
);
}

/**
* 发送视频消息
* @param  string $content 要发送的信息
*/
private function sendvideo($video){
list (
$video ['media_id'],
$video ['title'],
$video ['description']
) = $video;

$this->send ['video'] = $video;
}

/**
* 发送语音消息
* 
* @param string $content
*        	要发送的信息
*/
private function sendvoice($content) {
$this->send ['voice'] = array (
'media_id' => $content 
);
}

/**
* 发送音乐消息
* 
* @param string $content
*        	要发送的信息
*/
private function sendmusic($music) {
list ( 
$music ['title'], 
$music ['description'], 
$music ['musicurl'], 
$music ['hqmusicurl'], 
$music ['thumb_media_id']
) = $music;

$this->send ['music'] = $music;
}

/**
* 发送图文消息
* @param  string $news 要回复的图文内容
*/
private function sendnews($news){
$articles = array();
foreach ($news as $key => $value) {
list(
$articles[$key]['title'],
$articles[$key]['description'],
$articles[$key]['url'],
$articles[$key]['picurl']
) = $value;
if($key >= 9) { break; } //最多只允许10调新闻
}
$this->send['articles'] = $articles;
}


/**
* * 获取微信用户的基本资料
* 
* @param string $openid   发送者用户名
* @return array 用户资料
*/
public function user($openid = '') {
if ($openid) {
header ( "Content-type: text/html; charset=utf-8" );
$url = 'https://api.weixin.qq.com/cgi-bin/user/info';
$params = array ();
$params ['access_token'] = $this->getToken ();
$params ['openid'] = $openid;
$httpstr = http ( $url, $params );
$harr = json_decode ( $httpstr, true );
return $harr;
} else {
return false;
}
}

/**
* 生成菜单
* @param  string $data 菜单的str
* @return string  返回的结果；
*/
public function setMenu($data = NULL){
$access_token = $this->getToken();
$url = "https://api.weixin.qq.com/cgi-bin/menu/create?access_token={$access_token}";
$menustr = http($url, $data, 'POST', array("Content-type: text/html; charset=utf-8"), true);
return $menustr;
}

/**
* 回复文本信息
* @param  string $content 要回复的信息
*/
private function text($content){
$this->data['Content'] = $content;
}

/**
* 回复音乐信息
* @param  string $content 要回复的音乐
*/
private function music($music){
list(
$music['Title'], 
$music['Description'], 
$music['MusicUrl'], 
$music['HQMusicUrl']
) = $music;
$this->data['Music'] = $music;
}

/**
* 回复图文信息
* @param  string $news 要回复的图文内容
*/
private function news($news){
$articles = array();
foreach ($news as $key => $value) {
list(
$articles[$key]['Title'],
$articles[$key]['Description'],
$articles[$key]['PicUrl'],
$articles[$key]['Url']
) = $value;
if($key >= 9) { break; } //最多只允许10调新闻
}
$this->data['ArticleCount'] = count($articles);
$this->data['Articles'] = $articles;
}

/**
* 主动发送的信息
* @param  string $data    json数据
* @return string          微信返回信息
*/
private function send($data = NULL) {
$access_token = $this->getToken ();
$url = "https://api.weixin.qq.com/cgi-bin/message/custom/send?access_token={$access_token}";
$restr = http ( $url, $data, 'POST', array ( "Content-type: text/html; charset=utf-8" ), true );
return $restr;
}

/**
     * 数据XML编码
     * @param  object $xml  XML对象
     * @param  mixed  $data 数据
     * @param  string $item 数字索引时的节点名称
     * @return string
     */
    private function data2xml($xml, $data, $item = 'item') {
        foreach ($data as $key => $value) {
            /* 指定默认的数字key */
            is_numeric($key) && $key = $item;

            /* 添加子元素 */
            if(is_array($value) || is_object($value)){
                $child = $xml->addChild($key);
                $this->data2xml($child, $value, $item);
            } else {
            if(is_numeric($value)){
            $child = $xml->addChild($key, $value);
            } else {
            $child = $xml->addChild($key);
               $node  = dom_import_simplexml($child);
   $node->appendChild($node->ownerDocument->createCDATASection($value));
            }
            }
        }
    }

    /**
* 对数据进行签名认证，确保是微信发送的数据
* @param  string $token 微信开放平台设置的TOKEN
* @return boolean       true-签名正确，false-签名错误
*/
private function auth(){
/* 获取数据 */
$data = array($_GET['timestamp'], $_GET['nonce'], C ( 'WECHAT_TOKEN' ));
$sign = $_GET['signature'];

/* 对数据进行字典排序 */
sort($data);

/* 生成签名 */
$signature = sha1(implode($data));

return $signature === $sign;
}

/**
* 获取保存的accesstoken
*/
private function getToken() {
$stoken = array ();
$stoken = S ( 'S_TOKEN' ); // 从缓存获取ACCESS_TOKEN
if (is_array ( $stoken )) {
$nowtime = time ();
$difftime = $nowtime - $stoken ['tokentime']; // 判断缓存里面的TOKEN保存了多久；
if ($difftime > 7000) { // TOKEN有效时间7200 判断超过7000就重新获取;
$accesstoken = $this->getAcessToken (); // 去微信获取最新ACCESS_TOKEN
$stoken ['tokentime'] = time ();
$stoken ['token'] = $accesstoken;
S ( 'S_TOKEN', $stoken ); // 放进缓存
} else {
$accesstoken = $stoken ['token'];
}
} else {
$accesstoken = $this->getAcessToken (); // 去微信获取最新ACCESS_TOKEN
$stoken ['tokentime'] = time ();
$stoken ['token'] = $accesstoken;
S ( 'S_TOKEN', $stoken ); // 放进缓存
}

return $accesstoken;
}

/**
* 重新从微信获取accesstoken
*/
private function getAcessToken() {
$token = C ( 'WECHAT_TOKEN' );
$appid = C ( 'WECHAT_APPID' );
$appsecret = C ( 'WECHAT_APPSECRET' );

$url = 'https://api.weixin.qq.com/cgi-bin/token';
$params = array ();
$params ['grant_type'] = 'client_credential';
$params ['appid'] = $appid;
$params ['secret'] = $appsecret;
$httpstr = http ( $url, $params );
$harr = json_decode ( $httpstr, true );
return $harr ['access_token'];
}

}