Question

我尝试在php中使用ajax上传文件，花了一天时间才解决这个问题。我读了同样的问题并尝试使用它，但它确实没有用。也许它可能会混乱，因为我试图将所有解决方案代码从堆栈溢出到我的代码。

它可能很长但是plz帮助我。谢谢T.T

html part。

<form id="fileform" name="fileform" enctype="multipart/form-data">
   <input id="fileinput" multiple="multiple" value="file" type="file" name="file">
   <input id="file" type="submit" value="submit">
</form>

ajax part。

  <script>
$(document).ready(function(){

  $('form#fileform').submit(function(event){
    event.preventDefault();

    var formData = new FormData($(this)[0]);
    $.ajax({
      type:"POST",
      url:"io_update.php",
      contentType: "application/json; charset=utf-8",
      dataType:"JSON",
      data: formData,
      cache : false,
     processData: false,

      success:function(data){
        // var success_text = '<div class="alert alert-success"><strong>Upload success.</strong> Here is the link to your file:</div>' +
                //  '<span class="lead"><a target="_blank" href="https://file.io/' + data + '">https://file.io/' + data + '</a><br /><br /></span>';
          console.log("hh");
          // console.log(data);
                // $(this.getElementById("list")).html(success_text);
        document.getElementById("list").innerHTML ='<div class="alert alert-success" style="font-size:10px; "><strong>Upload success.</strong> Here is the link to your file:</div>' +
                    '<span class="lead"><a target="_blank" href="' + data + '">' + data + '</a><br /><br /></span>';
        // alert(data);

              },error:function(request,status,error){
        console.log("gg");
alert("code:"+request.status+"\n"+"message:"+request.responseText+"\n"+"error:"+error);}



    })
  })
})

php part。

$file = json_decode($_POST['file']);
$folder="img/";

move_uploaded_file($file,$folder.$file);

function getimg($url) {
   $headers[] = 'Accept: image/gif, image/x-bitmap, image/jpeg, image/pjpeg';
   $headers[] = 'Connection: Keep-Alive';
   $headers[] = 'Content-type: application/x-www-form-urlencoded;charset=UTF-8';
   $user_agent = 'php';
   $process = curl_init($url);
   curl_setopt($process, CURLOPT_HTTPHEADER, $headers);
   curl_setopt($process, CURLOPT_HEADER, 0);
   curl_setopt($process, CURLOPT_USERAGENT, $user_agent); //check here
   curl_setopt($process, CURLOPT_TIMEOUT, 30);
   curl_setopt($process, CURLOPT_RETURNTRANSFER, 1);
   curl_setopt($process, CURLOPT_FOLLOWLOCATION, 1);
   $return = curl_exec($process);
   curl_close($process);
   return $return;
}

$imagename= basename($file);
$image = getimg($file);
file_put_contents('./img/'.$imagename,$image);


$sql1="INSERT INTO a_io(file) VALUES('$imagename')";
$result = mysqli_query($db,$sql1);

并且错误消息是消息：

Notice: Undefined index: file in /home/hosting_users/kaist6123/www/io/io_update.php on line 45

Warning: file_put_contents(./img/): failed to open stream: Is a directory in /home/hosting_users/kaist6123/www/io/io_update.php on line 81

在我的数据库中，我在ajax之后取空文件。

empty file comes into database

Answer 1

从你的ajax函数中删除它们

--debug

评论后更新

尝试替换以下行

contentType: "application/json; charset=utf-8",
dataType:"JSON",

带

$file = json_decode($_POST['file']);

文件上传抛出＆＃34;未定义索引＆＃34;使用ajax上传文件时php中的错误

1 个答案: