使用Angular 8和PHP将图像上载到无法正常工作的服务器

我已经挣扎了好几个小时，现在试图上传一个图像到我的服务器使用PHP。我以前只在Angular 2中工作过，现在我改成了8，我似乎无法让我的旧代码正常工作，我怀疑这是因为Http方法更新到HttpClient

下面是app.component.ts，它使用输入文件调用服务：

let fileslen = $("#images")[0].files.length;
for(let i = 0; i < fileslen; i++){
  this.files.push($("#images")[0].files[i]);
  this.serviceImage.uploadImage(upload_url, this.files[i])
        .subscribe(
            response=> {
              this.imagesUrl.push(response["image"]);
            },
            error=>{
              alert('error:' + JSON.stringify(error));
            }
        );
}

最后是php文件：

<?php
header("Access-Control-Allow-Origin: *");
header("Access-Control-Allow-Headers: Content-Type");
header("Access-Control-Allow-Methods: GET, POST, OPTIONS");

    $uploads_dir = 'uploads';
    $object = new stdClass();
    $errorMsg = "Error in image";
    $noFile = "No file";
    if(isset($_FILES['imagen'])){
        $tmp_name = $_FILES['image']['tmp_name'];
        $ext = pathinfo($_FILES['image']['name'], PATHINFO_EXTENSION);
        $randNum = rand(0, 1000);
        $fileName = time() . sha1($_FILES['image']['name']. $randNum) . "." .$ext;
        if(move_uploaded_file($tmp_name, "$uploads_dir/$fileName")){
            $object->image = "$fileName";
            echo json_encode($object);
        }else{
            echo json_encode($errorMsg);
        }
    }else{
        echo json_encode($noFile);
    }
?>

---

有控制台错误吗？控制台中的请求-响应是什么样子的？如果有问题，需要正确解释。“不工作”是一种过于宽泛的描述。会发生什么？你做了什么调试？你的JS希望结果是JSON，但你只是在出错时按原样输出字符串。尝试将错误消息作为json返回。我这样做了，返回的错误是“img中的错误”，因此无法移动文件。确保您有正确的目标文件夹，并且web服务器运行时的用户可以写入该文件夹。您是否已检查web服务器错误日志，以查看是否收到任何可能解释此问题的错误消息？

<?php
header("Access-Control-Allow-Origin: *");
header("Access-Control-Allow-Headers: Content-Type");
header("Access-Control-Allow-Methods: GET, POST, OPTIONS");

    $uploads_dir = 'uploads';
    $object = new stdClass();
    $errorMsg = "Error in image";
    $noFile = "No file";
    if(isset($_FILES['imagen'])){
        $tmp_name = $_FILES['image']['tmp_name'];
        $ext = pathinfo($_FILES['image']['name'], PATHINFO_EXTENSION);
        $randNum = rand(0, 1000);
        $fileName = time() . sha1($_FILES['image']['name']. $randNum) . "." .$ext;
        if(move_uploaded_file($tmp_name, "$uploads_dir/$fileName")){
            $object->image = "$fileName";
            echo json_encode($object);
        }else{
            echo json_encode($errorMsg);
        }
    }else{
        echo json_encode($noFile);
    }
?>

[Mon Sep 23 13:38:53.573923 2019] [proxy_fcgi:error] 
[pid 17680:tid 140606869325568] 
[client 213.127.0.0:37223] 
AH01071: Got error 'PHP message: PHP Warning:
move_uploaded_file(uploads/156923873339c6f3f02e62236530e6b49efbafabacd958828a.pdf): 
failed to open stream: 
No such file or directory in /var/www/clients/client490/web1568/web/app/php/upload_image.php 
on line 15\nPHP message: PHP Warning:  move_uploaded_file(): 
Unable to move '/var/www/clients/client490/web1568/tmp/phpIdHxdy' 
to 'uploads/156923873339c6f3f02e62236530e6b49efbafabacd958828a.pdf' 
in /var/www/clients/client490/web1568/web/app/php/upload_image.php 
on line 15\n', 
referer: {url}