php微信公眾平臺開發(fā)類實例

字號:


    <?php
    class Wechat {
    /**
    * 微信推送過來的數(shù)據(jù)或響應(yīng)數(shù)據(jù)
    * @var array
    */
    private $data = array();
    /**
    * 構(gòu)造方法,用于實例化微信SDK
    * @param string $token 微信開放平臺設(shè)置的TOKEN
    */
    public function __construct($token) {
    $this->auth($token) || exit;
    if(!empty($_GET['echostr'])){
    exit($_GET['echostr']);
    } else {
    try
    {
    $xml = file_get_contents("php://input");
    $xml = new SimpleXMLElement($xml);
    $xml || exit;
    foreach ($xml as $key => $value) {
    $this->data[$key] = strval($value);
    }
    }catch(Exception $e){
    }
    }
    }
    /**
    * 獲取微信推送的數(shù)據(jù)
    * @return array 轉(zhuǎn)換為數(shù)組后的數(shù)據(jù)
    */
    public function request(){
    return $this->data;
    }
    /**
    * * 響應(yīng)微信發(fā)送的信息(自動回復(fù))
    * @param string $to 接收用戶名
    * @param string $from 發(fā)送者用戶名
    * @param array $content 回復(fù)信息,文本信息為string類型
    * @param string $type 消息類型
    * @param string $flag 是否新標(biāo)剛接受到的信息
    * @return string XML字符串
    */
    public function response($content, $type = 'text', $flag = 0){
    /* 基礎(chǔ)數(shù)據(jù) */
    $this->data = array(
    'ToUserName' => $this->data['FromUserName'],
    'FromUserName' => $this->data['ToUserName'],
    'CreateTime' => time(),
    'MsgType' => $type,
    );
    /* 添加類型數(shù)據(jù) */
    $this->$type($content);
    /* 添加狀態(tài) */
    $this->data['FuncFlag'] = $flag;
    /* 轉(zhuǎn)換數(shù)據(jù)為XML */
    $xml = new SimpleXMLElement('<xml></xml>');
    $this->data2xml($xml, $this->data);
    exit($xml->asXML());
    }
    /**
    * 回復(fù)文本信息
    * @param string $content 要回復(fù)的信息
    */
    private function text($content){
    $this->data['Content'] = $content;
    }
    /**
    * 回復(fù)音樂信息
    * @param string $content 要回復(fù)的音樂
    */
    private function music($music){
    list(
    $music['Title'],
    $music['Description'],
    $music['MusicUrl'],
    $music['HQMusicUrl']
    ) = $music;
    $this->data['Music'] = $music;
    }
    /**
    * 回復(fù)圖文信息
    * @param string $news 要回復(fù)的圖文內(nèi)容
    */
    private function news($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; } //最多只允許10調(diào)新聞
    }
    $this->data['ArticleCount'] = count($articles);
    $this->data['Articles'] = $articles;
    }
    /**
    * 數(shù)據(jù)XML編碼
    * @param object $xml XML對象
    * @param mixed $data 數(shù)據(jù)
    * @param string $item 數(shù)字索引時的節(jié)點名稱
    * @return string
    */
    private function data2xml($xml, $data, $item = 'item') {
    foreach ($data as $key => $value) {
    /* 指定默認(rèn)的數(shù)字key */
    is_numeric($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));
    }
    }
    }
    }
    /**
    * 對數(shù)據(jù)進(jìn)行簽名認(rèn)證,確保是微信發(fā)送的數(shù)據(jù)
    * @param string $token 微信開放平臺設(shè)置的TOKEN
    * @return boolean true-簽名正確,false-簽名錯誤
    */
    private function auth($token){
    if(empty($_GET['signature'])) return;
    /* 獲取數(shù)據(jù) */
    $data = array($_GET['timestamp'], $_GET['nonce'], $token);
    $sign = $_GET['signature'];
    /* 對數(shù)據(jù)進(jìn)行字典排序 */
    sort($data,SORT_STRING);
    /* 生成簽名 */
    $signature = sha1(implode($data));
    return $signature === $sign;
    }
    }