public function get_accessToken()
{
$this->_appid = 'wxbd1a2fc08ddb36eb';
$this->secret = 'a9c068624d58926cb23584b4a1559b98';
// access_token 應該全局存儲與更新，以下代碼以寫入到文件中做示例
$data = json_decode(file_get_contents($this->_appid . "access_token.json"));
if ($data->expire_time < time()) {
$url = '
https://api.weixin.qq.com/cgi-bin/token?grant_type=client_credential&appid=' . $this->_appid . '&secret=' . $this->secret;
$res = file_get_contents($url);
$arr = json_decode($res, true);
$access_token = $arr['access_token'];
if ($access_token) {
$data->expire_time = time() + 7000;
$data->access_token = $access_token;
$data->appid = $this->_appid;
$fp = fopen($this->_appid . "access_token.json", "w"); //保存到本地
fwrite($fp, json_encode($data));
fclose($fp);
}
} else {
$access_token = $data->access_token;
}
echo $access_token;
}