提交post页面：
<!DOCTYPE html><html><head></head><body><form action="upload.php" method="post"> <input type="text" name="name"> <input type="submit"></form></body></html>
接收post页面：
<?phpvar_dump($_POST);//post 是数组，不能用echoreturn;$filename = $_POST['name'];if ($filename) { file_put_contents("9.txt",$filename);}echo $filename;?>
