regex pattern for extracting URLs

I'm looking for a regular expression to accomplish a specific task. I'm hoping someone who's really good at regex patterns can lend a quick hand. I need a regex pattern that will grab URLs out of HTML that have a certain link text. (i.e. the word "Continue") This is what I have so far but it does not work properly (If there are other attributes in the <a> tag it returns them as part of the URL.)     preg_match_all('#<a[\s]+[^>]*href\s*=\s*([\"\']+)([^>]+?)(\1|>)>Continue</a>#i', $html, $matches); It needs to be able to extract the URL and disregard arbitrary attributes in the HTML tag Test it with the following examples: <a href=/path/to/url.html>Continue</a> <a href='/path/to/url.html'>Continue</a> <a href="http://example.com/path/to/url.html" class="link">Continue</a> <a style="font-size: 12px" href="http://example.com/path/to/url.html" onlick="someFunction('foo','bar')">Continue</a> Please reply Your help is much appreciated. Thanks in advance, Brad F.