获得access_token
 	public function take_access_token(){
		$ch = curl_init();
		$APPID=C("APPID");
		
		$APPSECRET=C("APPSECRET");
		

		// 2. 设置选项，包括URL
		curl_setopt($ch, CURLOPT_URL, "https://api.weixin.qq.com/cgi-bin/token?grant_type=client_credential&appid={$APPID}&secret={$APPSECRET}");
		curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
		curl_setopt($ch, CURLOPT_HEADER, 0);
		curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, false);
		// 3. 执行并获取HTML文档内容
		$output = curl_exec($ch);
		// 4. 释放curl句柄
		curl_close($ch);
		// var_dump($output);
		// print_r($output);
		echo'<br>';
		$arr = json_decode($output,true);
		$arr['token_time'] = time();
		// var_dump($arr['access_token']);
		return($arr);
		    }