redirect php page

I would like to redirect a php page http://example.com/viewer.php?file=anything.jpg to http://example.com/images/anything.jpg How can that be done? Thanks and appreciate if anyone can help.

 

Two ways - Using ".htaccess" [URL rewriting] or Writing viewer.php.

Using the latter way -
just write viewer.php.

 

Thanks! I got it working:

	if($_GET['file'])
header("Location: images/".$_GET['file']);

Code (markup):

 

maybe you want to secure that script a little bit.

Filter out these:"/" , "\" and "."

to avoid people from redirecting to etc/passwd file.

 

if (preg_match('~^\w+\.(jpg|gif|png)$~i', $_GET['file']))
header("Location: images/".$_GET['file']);

PHP:

 

You can also do that with htaccess to have SEO Friendly URLS too
Add this too you htaccess

RewriteEngine On
RewriteRule ^images/([^/]*)$ /viewer.php?file=$1 [L]

Code (markup):

 

Try this...,
header("Location: ".$_GET['file']);
its general..!