简单的PHP文件上传例子

<?phpif (is_uploaded_file($_FILES['upfile']['tmp_name'])){      //is_uploaded_file() 函数判断指定的文件是否是通过 HTTP POST 上传的$upfile=$_FILES["upfile"];$name = $upfile["name"];$type = $upfile["type"];$size = $upfile["size"];$tmp_name = $upfile["tmp_name"];$error = $upfile["error"];switch ($type) {case 'image/pjpeg' : $ok=1;break;case 'image/jpeg' : $ok=1;break;case 'image/gif' : $ok=1;break;case 'image/png' : $ok=1;break;}if($ok && $error=='0'){ move_uploaded_file($tmp_name,'up/'.$name);            //move_uploaded_file() 函数将上传的文件移动到新位置 echo "上传成功";}}?><form action="" enctype="multipart/form-data" method="post" name="upform">  上传文件:  <input name="upfile" type="file">  <input type="submit" value="上传"><br> </form>