相关疑难解决方法(0)

这是我的选择选项

<select name="recomemded_food[]" value="" style="width:560px;" multiple class="chosen-select" >
<option value="American Black Bear">American Black Bear</option>
<option value="Asiatic Black Bear">Asiatic Black Bear</option>
<option value="Brown Bear">Brown Bear</option>
<option value="Giant Panda">Giant Panda</option>
</select>

以下是我的代码试图使用foreach循环来获取数组值.但是我收到以下错误:

@foreach (explode(',',old('recomemded_food')) as $recomemded_food) 
{{$recomemded_food}}
@endforeach

错误消息:explode()期望参数2为字符串