Regexp to filter style from HTML

[kidko]

I'm trying to strip out the "style" attribute from a bit of user input. If the user input is $input, why wouldn't the following, given

<tag style="blah" href="site">Content</tag>

leave me with

<tag href="site">Content</tag>

It doesn't take out anything at all!

$strip_regexp = array('/(.*)style=\".*\"(.*)/', '/(.*)style=\'.*\'(.*)/');
$input = preg_replace($strip_regexp, "$1$2", $input); // apply strip_regexp