tp5 view模板中 判断一个值是否在某个数组内 复选框用到了

{foreach $serviceInfo as $v}
    <div style="display: inline-block;margin-right: 10px;">
        <input type="checkbox" value="{$v.service_item}"  } checked {/in}>
        <label for="checkbox-{$v.id}">{$v.service_item}</label>
    </div>
{/foreach}

        $serviceInfo = model('Service')->order('update_time desc')->select();
        $this->assign('serviceInfo', $serviceInfo);
        $arr = [1,3];
        $this->assign('arr', $arr);
        return view();