Javascript PHP无法正常工作

我使用AJAX表单通过AJAX将个人资料图片上传到我的网站上，但问题是我无法做到这一点。我制作了一个php页面，表单将通过ajax发布。看看：

<?php
$file = $_FILES["file"];
$filename = $_FILES["file"]["name"];
$tempdir = $_FILES["file"]["tmp_name"];
$error = $_FILES["file"]["error"];
$type = $_FILES["file"]["type"];
$size = $_FILES["file"]["size"];

$maxsize = 524288;
$allowedtypes = array("image/png", "image/jpg", "image/jpeg", "image/bmp");

$errormsg = "";
if(!empty($error))
{
    switch($error)
    {
        case '1':
            $errormsg = 'The uploaded file exceeds the upload_max_filesize directive in php.ini';
            break;
        case '2':
            $errormsg = 'The uploaded file exceeds the MAX_FILE_SIZE directive that was specified in the HTML form';
            break;
        case '3':
            $errormsg = 'The uploaded file was only partially uploaded';
            break;
        case '4':
            $errormsg = 'No file was uploaded.';
            break;
        case '6':
            $errormsg = 'Missing a temporary folder';
            break;
        case '7':
            $errormsg = 'Failed to write file to disk';
            break;
        case '8':
            $errormsg = 'File upload stopped by extension';
            break;
        default:
            $errormsg = 'No error code avaiable';
    }
} elseif(empty($tmpdir) || $tmpdir == 'none') {
    $errormsg = 'No file was uploaded..';
} elseif(!in_array($type, $allowedtypes) || $size > $maxsize) {
    $errormsg = 'Either image type not supported or size is extending 512 KB';
} else {
    $filename = $_SESSION["username"];
    $filename_array = explode(".",$_POST["filename"]);
    $extension = array_pop($filename_array);
    $path = 'folder/' . Utilities::GetDefaultPicturePath() . $filename . "." . $extension;
    $location = $path . $filename; 
    move_uploaded_file($tmpdir, $location); 
    //for security reason, we force to remove all uploaded file
    @unlink($file);     
}

echo $errormsg;
?>

最后，

ajaxForm（）

jquery插件脚本如下：

$('#form').ajaxForm(function (data) {
    console.log(data);
});

正如您所看到的，我正在记录返回的数据。在提交表格时，我总是看到“没有上传任何文件…”。正如您在我的PHP页面上看到的，只有当文件的临时目录为空或设置为“无”时，才会打印该错误

那么问题出在哪里，我该如何解决这个问题呢

---

谢谢。

您将结果分配给第4行中的$tempdir，然后选中下面的$tmpdir

您将结果分配给第4行中的$tempdir，然后选中下面的$tmpdir

在代码中，您将移动上传的文件逻辑置于最后一个else条件

if(){
  ............................
}
elseif(empty($tmpdir) || $tmpdir == 'none') {
    $errormsg = 'No file was uploaded..';
} elseif(!in_array($type, $allowedtypes) || $size > $maxsize) {
    $errormsg = 'Either image type not supported or size is extending 512 KB';
} else {
    $filename = $_SESSION["username"];
    $filename_array = explode(".",$_POST["filename"]);
    $extension = array_pop($filename_array);
    $path = 'folder/' . Utilities::GetDefaultPicturePath() . $filename . "." . $extension;
    $location = $path . $filename; 
    move_uploaded_file($tmpdir, $location); 
    //for security reason, we force to remove all uploaded file
    @unlink($file);     
}

由于tmpdir在文件移动前为空，因此控制权转到该块：

  elseif(empty($tmpdir) || $tmpdir == 'none') {
        $errormsg = 'No file was uploaded..';
    } 

上述检查应在您将文件移动到该位置后添加

---

在最后一个else条件中，文件被移动到tmpdir，因此在文件移动后检查该目录，您将在那里找到它。

在代码中，您将移动上传的文件逻辑置于最后一个else条件中

if(){
  ............................
}
elseif(empty($tmpdir) || $tmpdir == 'none') {
    $errormsg = 'No file was uploaded..';
} elseif(!in_array($type, $allowedtypes) || $size > $maxsize) {
    $errormsg = 'Either image type not supported or size is extending 512 KB';
} else {
    $filename = $_SESSION["username"];
    $filename_array = explode(".",$_POST["filename"]);
    $extension = array_pop($filename_array);
    $path = 'folder/' . Utilities::GetDefaultPicturePath() . $filename . "." . $extension;
    $location = $path . $filename; 
    move_uploaded_file($tmpdir, $location); 
    //for security reason, we force to remove all uploaded file
    @unlink($file);     
}

由于tmpdir在文件移动前为空，因此控制权转到该块：

  elseif(empty($tmpdir) || $tmpdir == 'none') {
        $errormsg = 'No file was uploaded..';
    } 

上述检查应在您将文件移动到该位置后添加

---

在最后一种情况下，文件被移动到tmpdir，因此在文件移动后检查该目录，您会在那里找到它。

如果您查看浏览器控制台的网络检查器，它是否显示正在上载的文件？如果您查看浏览器控制台的网络检查器，它是否显示正在上载的文件？哈哈，夏普，感谢你这么快就发现了对不起，我不明白。你能解释一下吗？：）变量名不同。请注意，您进行赋值

$tempdir=$\u FILES[“file”][“tmp\u name”]

然后选中elseif（空（$tmpdir）| |$tmpdir=='none'）$tmpdir是未赋值变量，与$TEMPDIR不同。成功了。还有一些其他问题，但我自己解决了。谢谢：）哈哈，夏普，谢谢你这么快就发现了。对不起，我没听懂。你能解释一下吗？：）变量名不同。请注意，您进行赋值

$tempdir=$\u FILES[“file”][“tmp\u name”]

然后选中elseif（空（$tmpdir）| |$tmpdir=='none'）$tmpdir是未赋值变量，与$TEMPDIR不同。成功了。还有一些其他问题，但我自己解决了。谢谢：）

if(){
  ............................
}
elseif(empty($tmpdir) || $tmpdir == 'none') {
    $errormsg = 'No file was uploaded..';
} elseif(!in_array($type, $allowedtypes) || $size > $maxsize) {
    $errormsg = 'Either image type not supported or size is extending 512 KB';
} else {
    $filename = $_SESSION["username"];
    $filename_array = explode(".",$_POST["filename"]);
    $extension = array_pop($filename_array);
    $path = 'folder/' . Utilities::GetDefaultPicturePath() . $filename . "." . $extension;
    $location = $path . $filename; 
    move_uploaded_file($tmpdir, $location); 
    //for security reason, we force to remove all uploaded file
    @unlink($file);     
}

  elseif(empty($tmpdir) || $tmpdir == 'none') {
        $errormsg = 'No file was uploaded..';
    }