Php 通过Ajax将多个选择插入到DB中以逗号分隔的一行中，形成提交表单，但内爆给出错误

我有一个Ajax表单，它将数据提交到我的MySQL数据库中

我有两个选择框，允许用户选择多个选项

下面是一个方框的HTLM代码示例：

<select class="select3 form-control select2-multiple track" name="sellingmethods" id ="sellingmethods" multiple="multiple" multiple data-placeholder="Choose ...">
    <option value="Telesales">Telesales</option>
    <option value="Party Planning">Party Planning</option>
    <option value="Door to Door">Door to Door</option>
    <option value="Face to Face">Face to Face</option>
    <option value="Online Demos">Online Demos</option>
    <option value="Affiliate Link">Affiliate Link</option>
    <option value="Appointment Setting">Appointment Setting</option>
</select>

这是目前给我的错误：

---

infrade（）：传递的参数无效

要访问通过选择多个作为数组提交的多个选项，您需要将name属性设置为数组，例如

sellingmethods[]

例如：

<select class="select3 form-control select2-multiple track" name="sellingmethods[]" id ="sellingmethods" multiple="multiple" multiple data-placeholder="Choose ...">

 <option value="Telesales">Telesales</option>
 <option value="Party Planning">Party Planning</option>
 <option value="Door to Door">Door to Door</option>
 <option value="Face to Face">Face to Face</option>
 <option value="Online Demos">Online Demos</option>
 <option value="Affiliate Link">Affiliate Link</option>
 <option value="Appointment Setting">Appointment Setting</option>
</select>

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然后，

$this->input->post（'sellingmethods'）

或

$\u post['sellingmethods']

将如预期的那样成为一个数组，并且您不应该再为您的内爆（）函数获取错误

<select class="select3 form-control select2-multiple track" name="sellingmethods[]" id ="sellingmethods" multiple="multiple" multiple data-placeholder="Choose ...">

 <option value="Telesales">Telesales</option>
 <option value="Party Planning">Party Planning</option>
 <option value="Door to Door">Door to Door</option>
 <option value="Face to Face">Face to Face</option>
 <option value="Online Demos">Online Demos</option>
 <option value="Affiliate Link">Affiliate Link</option>
 <option value="Appointment Setting">Appointment Setting</option>
</select>