Undefined array index: period, please give me some advice

Question

 <div class="task-item"> 审核周期：

                        <select style="display:inline;" class="task-txt" name="check_period">

                            {if condition="check_array($setting['period'])"}

                                {volist name="setting['period']" id="period"}

                                    <option value="{$period}"

                                    {if isset($item['check_period']) && $item['check_period']==$period}

                                    selected="selected"

                                    {/if}

                                    >

                                        {if condition="$period eq '0'"}

Answer 1

At least you have to clarify your problem and what do you want to do? What is your error message?

Answer 2

I don’t know where I went wrong, pure noob