使用php阻止url指定文件夹或路径

i have a Block specified Path. for example http://example.com/image or http://example.com/file.php Some one going to this path it need showing you dont have permission or redirect another page.. How to do this for Php.. give me good examples..

You can add index.php file in each and every directory that you want to prevent direct access. Inside index.php add

echo "<script>location.href='your_redirect_path';</script>"; or 

header("Location: your_redirect_path");
exit;