Can't get regex to match properly

I am trying to match this uri. Also I want 3 to match as id and 45 in pictures45.html as pagenumber.

/category/3/pictures45.html

HTML:

With this regex I got to match the category and id.

preg_match("/^\/category\/(?P<id>\d+)/", $url, $matches);

PHP:

With this regex I got to match the pagenumber.

preg_match("/(?P<pagenumber>\d).html/", $url, $matches);

PHP:

I figured I can combine both the regex and it should work but I can't get it to work.

preg_match("/^\/category\/(?P<id>\d+)(?P<pagenumber>\d).html/", $url, $matches);

PHP:

What am I doing wrong?

Thanks guys

 

This works but the regexp doesn't look so "good"

<?php
$url = '/category/3/pictures45.html';

preg_match('/\/category\/([0-9]+)\/([a-z]+)([0-9]+)/i', $url, $match);
echo('<pre>' . print_r($match, true) . '</pre>');

$id = $match[1];
$pagenumber = $match[3];

echo ('<p> ID = ' . $id . '</p>');
echo ('<p> Page number = ' . $pagenumber . '</p>');
?>

PHP:

 

xrvel, you are a genius. I have been trying for days to get it work.

Thanks for your help.