文件上传使用html页面,发布文件上传时，html页面挂起

我试图在php中添加一个文件上传脚本到我正在设计的网站。我使用了一个在线示例(我知道它不安全，我计划让它安全，我只想让基本功能首先运行)。

基本上发生的事情是，当我点击“提交”按钮时，页面会暂停并说“加载xyz服务器..”，永远不会进入post action php页面！这非常令人沮丧，我不明白为什么它不起作用！

代码如下，我已经在2台不同的服务器上尝试了这一结果。如果有人能让我知道我可能做错了什么，我会非常感激。

Choose a file to upload:

//Сheck that we have a file

if((!empty($_FILES["uploaded_file"])) && ($_FILES['uploaded_file']['error'] == 0)) {

//Check if the file is JPEG image and it's size is less than 350Kb

$filename = basename($_FILES['uploaded_file']['name']);

$ext = substr($filename, strrpos($filename, '.') + 1);

if (($ext == "jpg") && ($_FILES["uploaded_file"]["type"] == "image/jpeg") &&

($_FILES["uploaded_file"]["size"] < 350000)) {

//Determine the path to which we want to save this file

$newname = dirname(__FILE__).'/upload/'.$filename;

//Check if the file with the same name is already exists on the server

if (!file_exists($newname)) {

//Attempt to move the uploaded file to it's new place

if ((move_uploaded_file($_FILES['uploaded_file']['tmp_name'],$newname))) {

echo "It's done! The file has been saved as: ".$newname;

} else {

echo "Error: A problem occurred during file upload!";

}

} else {

echo "Error: File ".$_FILES["uploaded_file"]["name"]." already exists";

}

} else {

echo "Error: Only .jpg images under 350Kb are accepted for upload";

}

} else {

echo "Error: No file uploaded";

}

?>非常感谢您的时间，我已经搜索了几个小时来解决这个问题，但没有运气！