解决layui checkbox 提交多个值的问题

<div class="layui-form-item" >
   <label class="layui-form-label">品种</label>
   <div class="layui-input-inline">
     {foreach $quotation_type as $key=>$val}
        <input name="quotation_type" lay-skin="primary" value="{$key}" title="{$val}" type="checkbox">
     {/foreach}
   </div>
</div>

//获取checkbox数据
quotation = new Array();
$("input:checkbox[name='quotation_type']:checked").each(function(){
   quotation.push($(this).val());
});
var json = {};
for (var i = 0; i < quotation.length; i++) {
   json[i] = quotation[i];
}
let myJson = JSON.stringify(json);
data.field.quotation_type = myJson ;

//提交的checkbox  提交过来的是json字符串
$data['quotation_type'] = json_decode($request->post('quotation_type'),true);