获取access_token

public function get_accessToken()

{

$this->_appid = 'wxbd1a2fc08ddb36eb';

$this->secret = 'a9c068624d58926cb23584b4a1559b98';

// access_token 应该全局存储与更新，以下代码以写入到文件中做示例

$data = json_decode(file_get_contents($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;

}