layui+PHP上传图片

<div class="layui-form-item">
    <label class="layui-form-label">LOGOlabel>
    <div class="layui-input-block">
       <div class="layui-upload">
            <div class="forms">
              <input type="file" name="le_logo" id="logo">
              上传logo
            div>
            <div class="layui-upload-list upload-list" id="logolist">
                <img src="" alt="">
            div>
         div>
    div>
div>

.forms {
    width: 92px;
    height: 38px;
    overflow: hidden;
    background: green;
    position: relative;
    background-size: 100% 100%;
    margin-right: 0.2rem;
    border-radius: 3px;
    text-align: center;
    line-height: 38px;
    font-size: 14px;
    color: #fff;
    cursor: pointer;
    margin-bottom: 10px;
}
.upload-list {
    max-height: 150px;
    overflow: hidden;
}
.layui-upload-list img {
    width: 10%;
    margin: 0 20px 20px 0;
}

ShowImg('logo','logolist');
function ShowImg(id,list){
    var upimg = document.getElementById(id);
    var imglist = document.getElementById(list);
    upimg.onchange = function(){
        imglist.innerHTML = '';
        var url = window.URL.createObjectURL(this.files[0]);
        var img = document.createElement("img");
        img.setAttribute("src",url);
        imglist.appendChild(img);
    }
}

if(request()->file('le_logo')){
   $e_plan = request()->file('le_logo');
    $e_plan_url = $this->uploadfile($e_plan);
    $exhibitionData['le_logo'] = $e_plan_url[2];
}