/**
* 获取JS API Ticket
*
* @return {
"errcode":0,
"errmsg":"ok",
"ticket":"bxLdikRXVbTPdHSM05e5u5sUoXNKdvsdshFKA",
"expires_in":7200
}
*/
public function getJsTicket()
{
static $url = "https://api.weixin.qq.com/cgi-bin/ticket/getticket?type=jsapi&access_token=%s";
$ticket = Utility::getJsTicket($this);
if (empty($ticket) || time() > $ticket['expired']) {
$token = $this->getAccessToken();
$body = Utility::http(sprintf($url, $token));
$json = json_decode($body, true);
if (!$json || !empty($json['errcode'])) {
throw new Exception('Error - WeChat Can not get JsTicket.');
} else {
$ticket['ticket'] = $json['ticket'];
$ticket['expired'] = time() + $json['expires_in'] - 120;
Utility::setJsTicket($ticket, $this);
}
}
return $ticket['ticket'];
}
