function Uploadfile(){
//文件保存目录路径
$save_path = '../upload/';
//定义允许上传的文件扩展名
$ext_arr = array('rar','zip');
//最大文件大小
$max_size = 1000000;
//更改目录权限
@mkdir($save_path, 0777);
//有上传文件时
if (empty($_FILES) === false) {
//原文件名
$file_name = $_FILES['fileData']['name'];
//服务器上临时文件名
$tmp_name = $_FILES['fileData']['tmp_name'];
//文件大小
$file_size = $_FILES['fileData']['size'];
//检查目录
if (@is_dir($save_path) === false) {
alert("上传目录不存在。");
}
//检查目录写权限
if (@is_writable($save_path) === false) {
alert("上传目录没有写权限。");
}
//检查是否已上传
if (@is_uploaded_file($tmp_name) === false) {
alert("临时文件可能不是上传文件。");
}
//检查文件大小
if ($file_size > $max_size) {
alert("上传文件大小超过限制。");
}
//获得文件扩展名
$temp_arr = explode(".", $file_name);
$file_ext = array_pop($temp_arr);
$file_ext = trim($file_ext);
$file_ext = strtolower($file_ext);
//检查扩展名
if (in_array($file_ext, $ext_arr) === false) {
alert("上传文件扩展名是不允许的扩展名。");
}
//移动文件
if (move_uploaded_file($tmp_name, $file_path) === false) {
alert("上传文件失败。");
}
}

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