regex matching across mutliple lines

[slide]

I am trying to match some text inside html comments using a regular expression.

Im trying to get "thumbnails" out then also

	<div class="thumbnail">
		<a href="gallery.php?gallery=%[GALLERY]&amp;image=%[IMAGE]">
			<img src="%[IMAGEURL]" class="thumbnail" alt="%[CAPTION]" style="top: " />
		</a>
		<a href="gallery.php?gallery=%[GALLERY]&amp;image=%[IMAGE]" class="caption">%[CAPTION]</a>
	</div>

Example of what im mathing

<!-- section:thumbnails
	<div class="thumbnail">
		<a href="gallery.php?gallery=%[GALLERY]&amp;image=%[IMAGE]">
			<img src="%[IMAGEURL]" class="thumbnail" alt="%[CAPTION]" style="top: " />
		</a>
		<a href="gallery.php?gallery=%[GALLERY]&amp;image=%[IMAGE]" class="caption">%[CAPTION]</a>
	</div>
-->

[sweatje]

preg_match('~<!--\s+section:thumbnails(.*?)-->~ms', $content, $matches);