参考文档  https://layui.11dz.cn/doc/modules/upload.html

上传文件，点击不自动上传到服务器，做上传前的回调，获取到文件name

这里还需要用到一个

bindAction: '#test2_t' //指向一个按钮触发上传

bindAction属性是一个触发上传的按钮

上传前的回调choose

 ,choose: function(obj){
                //将每次选择的文件追加到文件队列
                var files = obj.pushFile();
                //预读本地文件，如果是多文件，则会遍历。(不支持ie8/9)
                obj.preview(function(index, file, result){
                    // console.log(index); //得到文件索引
                    // console.log(file); //得到文件对象
                    // console.log(result); //得到文件base64编码，比如图片
                    var html ='
">10px;">'+file.name+'" id="cha" src="/wp-content/themes/dt-the7-child03/images/cha.png" alt="">" name="file" value="'+result+'">
'
                    $("#inpuss_er").append(html);

                });

            }

// console.log(index); //得到文件索引 // console.log(file); //得到文件对象 // console.log(result); //得到文件base64编码，比如图片

这个是上传前回调，返回的数据，如果是多文件，layui会进行遍历

以下是代码部分

<script>
    layui.use('upload', function(){
        var upload = layui.upload;

        var ming = $('#firstname').val();
        var xing = $('#lastname').val();
        var email = $('#email').val();

        //点击多图上传的X,删除当前的图片
        $("body").on("click",".inpusss_er",function(){
            $(this).parent(".inpuss_er").remove();
        });
        var uploadInst = upload.render({
            elem: '#test2'
            ,url: 'http:/wp-content/themes/dt-the7-child03/php/upload1.php'
            ,accept:"file"
            ,data:{ming:ming,xing:xing,email:email}
            ,auto: false //选择文件后不自动上传
            ,bindAction: '#test2_t' //指向一个按钮触发上传
            ,choose: function(obj){
                //将每次选择的文件追加到文件队列
                var files = obj.pushFile();
                //预读本地文件，如果是多文件，则会遍历。(不支持ie8/9)
                obj.preview(function(index, file, result){
                    // console.log(index); //得到文件索引
                    // console.log(file); //得到文件对象
                    // console.log(result); //得到文件base64编码，比如图片
                    var html ='
'+file.name+''">
'
                    $("#inpuss_er").append(html);

                });

            }
            ,done: function(){

                document.getElementById('light').style.display='block';
                document.getElementById('fade').style.display='block';
                $("#inpuss_er").empty();
            }
            ,error: function(){
                layer.msg('上传失败');
            }
        });


    });

    $('#queren').click(function(){
        document.getElementById('light').style.display='none';
        document.getElementById('fade').style.display='none';
        window.location.reload();
    })
script>

下面是上传文件的入口代码

"Access-Control-Allow-Origin: *");
header("Access-Control-Allow-Methods: POST, GET, OPTIONS, PUT, DELETE");
header('Access-Control-Allow-Headers:x-requested-with,content-type');

if(isset($_FILES))
{
    $curlPost = $_POST['ming'].' '.$_POST['xing'].'_'.$_POST['email'];
    $www=$_FILES['file'];
    $scr = $www['tmp_name'];
    $ext = substr($www['name'],strrpos($www['name'],'.')+1); // 上传文件后缀
    $path = $www;
    $fp = fopen($scr, 'rb');
    $size = filesize($scr);
    // $path1=['path'=>"/450 7th avenue's shared workspace/tax panda/Tax Act Client List/Test/1761594081@qq.com/Client Uploaded/".date('YmdHis').$www['name'].'.'.$ext];
    $path1=['path'=>"/TaxAct Client List/A-2022 Client Doc/$curlPost/Client Uploaded/".$www['name']];
    $cheaders = array('Authorization: Bearer WEOR0m62p_QAAAAAAAAAAaE2ScoPo8uB5q-MvMsUUuGkEZ1N7bELP65BRgH0pLo3',
        'Content-Type: application/octet-stream',
        'Dropbox-API-Arg: '.json_encode($path1));
    $ch = curl_init('https://content.dropboxapi.com/2/files/upload');
    curl_setopt($ch, CURLOPT_HTTPHEADER, $cheaders);
    curl_setopt($ch, CURLOPT_PUT, true);
    curl_setopt($ch, CURLOPT_CUSTOMREQUEST, 'POST');
    curl_setopt($ch, CURLOPT_INFILE, $fp);
    curl_setopt($ch, CURLOPT_INFILESIZE, $size);
    curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
    $response = curl_exec($ch);
    print_r($response);
    curl_close($ch);
    fclose($fp);
    return $response;
//    if(isset(json_decode($response,true)['error_summary']))
//    {
//        echo json_encode(['code'=>1]);
//    }else{
//        echo json_encode(['code'=>2]);
//    }

}
?>