在微信公众号和H5网页开发中，常常需要开发调用打印机进行小票打印操作，通常的做法是调用蓝牙打印机，但是蓝牙打印机由于蓝牙连接的原因，往往稳定性差，需要客户端配合才能发挥好的效果，另外蓝牙打印机距离受限制，手机不能离蓝牙打印机太远，接下我给大家介绍一种云端方案。
云打印我的理解是打印机直连云端，打印需求方通过api调用云服务器，云服务器下发订单到打印机。此方案可以解决蓝牙打印机和usb打印机的诸多缺陷，特别适合外卖单，堂食单，网上商超，收银支付，后厨菜单，仓库订单等场景。
查阅网上资料得知成都优声科技出了云打印机，于是对接了他们，现分享一个网页版的demo，后端是用PHP写的，方便有需要的朋友对接学习。
index.html
<!DOCTYPE html><html lang="en"><head><meta charset="UTF-8"><title>热敏小票打印</title><link rel="stylesheet" href="/ajax/libs/twitter-bootstrap/4.0.0/css/bootstrap.min.css" integrity="sha384-Gn5384xqQ1aoWXA+058RXPxPg6fy4IWvTNh0E263XmFcJlSAwiGgFAW/dAiS6JXm" crossorigin="anonymous"></head><body><div class="container"><div class="py-5 text-center"><img class="d-block mx-auto mb-4" src="http://www.zhongwu.co/images/logo/logo-zhongwu-black.png" alt="" width="272" height="72"><h2>调用打印机</h2><p class="lead">优声云打印机可以通过http接口调用,以下参数请去获取</p></div><div class="row"><div class="col-md-8 order-md-1"><h4 class="mb-3">请填写如下表单</h4><form class="needs-validation" novalidate method="post" action="print.php"><div class="mb-3"><label for="username">APPID</label><div class="input-group"><input type="text" class="form-control" id="username" placeholder="请填写appid" name="appid" required><div class="invalid-feedback" style="width: 100%;">请填写appid</div></div></div><div class="mb-3"><label for="email">APPSECRET</label><input type="email" class="form-control" id="email" placeholder="请填写appsecret" name="appsecret" required><div class="invalid-feedback">请填写appsecret</div></div><div class="mb-3"><label for="address">打印机终端号</label><input type="text" class="form-control" id="address" placeholder="请输入打印机终端号" required name="device_id"><div class="invalid-feedback">请输入打印机终端号</div></div><div class="mb-3"><label for="address2">打印机秘钥</label><input type="text" class="form-control" id="address2" placeholder="请输入打印机秘钥" name="device_secret" required><div class="invalid-feedback">请输入打印机秘钥</div></div><div class="mb-3"><label for="address2">打印内容</label><textarea type="text" class="form-control" id="address2" placeholder="请输入打印内容" name="printdata" required></textarea><div class="invalid-feedback">请输入打印内容</div></div><hr class="mb-4"><button class="btn btn-primary btn-lg btn-block" type="submit">提交打印</button></form></div></div><footer class="my-5 pt-5 text-muted text-center text-small"><p class="mb-1">© - 优声科技&优声云打印机</p><ul class="list-inline"><li class="list-inline-item"><a href="">技术支持</a></li></ul></footer></div></body></html>
print.php
<?phprequire_once __DIR__ . "/../vendor/autoload.php";$app_id = $_POST['appid'];$app_secret = $_POST['appsecret'];$device_id = $_POST['device_id'];$device_secret = $_POST['device_secret'];$rpc = new \ushengyun\protocol\RpcClient($app_id, $app_secret);$Zprinter = new \ushengyun\Printer($rpc);$printdata = empty($_POST['printdata']) ? '优声云拥有自主研发的云打印机，提供稳定高效，高可用的云打印方案' : $_POST['printdata'];try {var_dump($Zprinter->set_args($device_id, $device_secret)->cloud_print($printdata));} catch (Exception $e) {echo $e;}
下载链接 SDK下载
打印效果：
不得不说，还是很理想的
