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php公众平台开发类 PHP ?phpclass Wechat {/** * 微信推送过来的数据或响应数据 * @var array */private $data = array();/** * 构造方法,用于实例化微信SDK * @param string $token 微信开放平台设置的TOKEN */public function __construct($token) {$this-

php公众平台开发类 PHP
<?php

class Wechat {

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

	/**
	 * 构造方法,用于实例化微信SDK
	 * @param string $token 微信开放平台设置的TOKEN
	 */
	public function __construct($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){
			}
		}
	}

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

	/**
	 * * 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'   => 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());
	}

	/**
	 * 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;
	}

	/**
     * 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 $token 微信开放平台设置的TOKEN
	 * @return boolean       true-签名正确,false-签名错误
	 */
	private function auth($token){
	
		if(empty($_GET['signature'])) return;
		
		/* 获取数据 */
		$data = array($_GET['timestamp'], $_GET['nonce'], $token);
		$sign = $_GET['signature'];
		
		/* 对数据进行字典排序 */
		sort($data,SORT_STRING);

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

		return $signature === $sign;
	}

}
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