More .htaccess redirect help needed

I have a bunch of links that have to be redirected... But there are only two kind of those links:

1. URLs like http://mydomain.com/category/new%20york should be redirected to http://mydomain.com/category/New-York, so, every space (or %20) should be "minus", and first letter should be upper case (in category name).

2. http://mydomain.com/category/california should be http://mydomain.com/category/California, so first letter have to be upper case.

3. Sure, if it is http://mydomain.com/category/New%20York, it should be http:/开发者_运维技巧/mydomain.com/category/New-York.

Can you help me with those please?

I'm not too sure that mod_rewrite itself can convert words into their uppercased versions nor switch %20 into a - - you could however redirect to the lower-case version of the page, and let PHP set the record straight.

As far as I know, RewriteMap is only capable of converting a whole url to either upper- or lowercase... so you'll probably have to go with my suggestion above.

The code for that would be the following:

^category/([a-z\-\ ]+)(/)?$ index.php?category=$1 [NC,L]

...and in php, you would want to do the following:

<?php
     //Get the category
     $cat = ( isset($_GET['category']) )? $_GET['category'] : '';

     //Check if we need to convert the url
     if( ($cat != '') && (strpos($cat, ' ') !== false) || !ctype_upper($cat[0]) ) {

        //$new_category = Word-Number-One
        $new_category = str_replace(' ', '-', ucwords($cat));

        //Redirect to the new URL
        header('Location: http://' . $_SERVER['SERVER_NAME'] . '/category/' . $new_category);

     }         
?>

I've tried it out on my own server and it works just fine, so hopefully I didn't manage to cripple the code upon copying it to the textarea.