Normalize Youtube/Video videos to SWF paths

normalize_flash_video_url.php

<?php

function normalize_flash_video_url($url) {
	$url = trim($url);
	if (preg_match('{(^http://www\.)?youtube\.com}', $url)) {
		if (preg_match('{watch\?v=([^&]+)}', $url, $matches)) {
			if (isset($matches[1]))
				return "http://www.youtube.com/v/{$matches[1]}";
		} else if (preg_match('{/v/(\w+)}', $url, $matches))
			return "http://www.youtube.com/v/{$matches[1]}";
	} else if (preg_match('{(^http://www\.)?vimeo\.com/(\d+)}', $url, $matches)) {
		if (isset($matches[2]))
			return "http://vimeo.com/moogaloop.swf?clip_id={$matches[2]}" . 
				"&amp;server=vimeo.com&amp;show_title=1&amp;show_byline=1" .
				"&amp;show_portrait=0&amp;color=&amp;fullscreen=1";
	}
	return false;
}

if ($_SERVER['PHP_SELF'] == __FILE__) {
	assert(normalize_flash_video_url('http://www.youtube.com/v/Dq366VCmS2c') == 'http://www.youtube.com/v/Dq366VCmS2c');
	assert(normalize_flash_video_url('http://www.youtube.com/watch?v=q6iAuPmFkuY&playnext=1&videos=6DSLYG1s0bY&feature=grec_index') == 'http://www.youtube.com/v/q6iAuPmFkuY');
	assert(normalize_flash_video_url('http://vimeo.com/13354354') === 'http://vimeo.com/moogaloop.swf?clip_id=13354354&amp;server=vimeo.com&amp;show_title=1&amp;show_byline=1&amp;show_portrait=0&amp;color=&amp;fullscreen=1');
}