表单必须用 enctype="multipart/form-data"
代码：
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"><html xmlns="http://www.w3.org/1999/xhtml"><head> <meta http-equiv="Content-Type" content="text/html; charset=utf-8" /> <title>upload</title></head><body><form action="./upload_process.php" method="post" enctype="multipart/form-data"> <div> <input type="file" name="user_file" /> </div> <div> <input type="submit" /> </div></form></body></html>
保存文件时，检查文件类型，本来想使用$_FILES["user_file"]["type"]，结果发现在各个浏览器下不一致。
只能使用文件名检查。$_FILES["user_file"]["type"]firefox下：application/zip 或 application/octet-streamie下：application/x-zip-compressedchrome下：空
<?phpvar_dump($_FILES["user_file"]);$tmp = explode('.',$_FILES["user_file"]["name"]);$last = count($tmp) -1;if($tmp[$last]!='zip'){ echo 'only allow zip'; exit;}$new_name_and_path = './files/'.md5($_FILES["sns_file"]["tmp_name"]).'.zip';move_uploaded_file($_FILES["user_file"]["tmp_name"],$new_name_and_path); ?>转载于:https://www.cnblogs.com/sink_cup/archive/2010/12/30/php_upload_file.html
