小程序模板消息一个formId只能下发一次，而且有过期时间，有时需要给用户多次发送模板消息，这是就得将formId缓存起来，
下面以thinkphp为例，
1.为了获取多个formId可以将用户点击都改成表单方式，每次请求数据携带formID
formSubmit(e) {var formId = e.detail.formId}
2.服务端缓存与获取函数
/*** Notes:获取并删除过期formId* @auther: xxf* Date: /10/10* Time: 16:47* @param $openid* @return int*/public function getFormId($uid){$form_id = 0;$form_ids = Cache::get($uid,[]);foreach ($form_ids as $k => $v){if (time() - $v['time'] > 604800){unset($form_ids[$k]);continue;}$form_id = $v['formId'];unset($form_ids[$k]);break;}if (!empty($form_ids))Cache::set($uid,$form_ids,604800);return $form_id;}/*** Notes:缓存formId* @auther: xxf* Date: /10/10* Time: 16:52* @param $openid* @param $form_id* @return bool*/public function setFormId($uid,$form_id){$form_ids = Cache::get($uid);if (!is_array($form_ids))$form_ids = [];foreach ($form_ids as $k => $v){if (time() - $v['time'] > 604800);unset($form_ids[$k]);}$form_id_data = ['formId' => $form_id,'time' =>time()];array_push($form_ids,$form_id_data);Cache::set($uid,$form_ids,604800);return true;}
3.
缓存
$this->setFormId($post['uid'],$post['formId']);
获取
//发布者formId$formId = $this->getFormId($post['touser']);
4.发送模板消息
<?phpnamespace app\program\model;use think\Model;class TempMessage extends Model{private $appId = '';private $appSecret = '';public function initialize(){$this->appId = config('app.program.AppID');$this->appSecret = config('app.program.AppSecret');$this->template_id = config('app.program.template_id');}public function sendCom($openid,$formId,$content,$username,$doc_id){$tokenUrl = "https://api./cgi-bin/token?grant_type=client_credential&appid=$this->appId&secret=$this->appSecret";$tokenValue = $this->httpGet($tokenUrl);$TmUrl = "https://api./cgi-bin/message/wxopen/template/send?access_token=$tokenValue->access_token";$data = ['touser' => $openid,'template_id' => $this->template_id,'page' => "/pages/zhulian/indetail/indetail?id=$doc_id",'form_id' => $formId,"data"=>array('keyword1' => array('value'=>$content),'keyword2' => array('value'=>$username),'keyword3' => array('value'=>date('Y-m-d H:i:s',time()))),];return $this->httpPost($TmUrl,$data);}private function httpGet($url) {$curl = curl_init();curl_setopt($curl, CURLOPT_RETURNTRANSFER, true);curl_setopt($curl, CURLOPT_TIMEOUT, 500);curl_setopt($curl, CURLOPT_SSL_VERIFYPEER, false);curl_setopt($curl, CURLOPT_SSL_VERIFYHOST, false);curl_setopt($curl, CURLOPT_URL, $url);$res = curl_exec($curl);curl_close($curl);return json_decode($res);}private function httpPost($url,$post_data) {$postdata = json_encode($post_data,JSON_UNESCAPED_UNICODE);$options = array('http' => array('method' => 'POST','header' => 'Content-type:application/json','content' => $postdata,'timeout' => 15 * 60 // 超时时间（单位:s）));$context = stream_context_create($options);$result = file_get_contents($url, false, $context);return $result;}}
//发布者formId$formId = $this->getFormId($post['touser']);if($formId){$temp = new TempMessage();$res = $temp->sendCom($user->openid,$formId,$post['content'],$uname->user,$post['doc_id']);}
