php typography-izer

gistfile1.txt

	//escape everything in tags
	preg_match_all('/(\<[^\>]+\>)/', $string, $tags);
	foreach($tags[0] as $key=>$value)
	{
		$string = str_replace($value, str_replace(array('"', "'"), array('\"', "\'"), $value), $string);
	}

	//replace double quotes
	preg_match_all('/(?<!\\\)"([^"]+)"/', $string, $matches);
	foreach($matches[0] as $key=>$value)
	{
		$string = str_replace($value, '&ldquo;' . $matches[1][$key] . '&rdquo;', $string);
	}

	//replace single quotes
	preg_match_all("/(?<!\\\)'([^']+)'/", $string, $matches);
	foreach($matches[0] as $key=>$value)
	{
		$string = str_replace($value, '&lsquo;' . $matches[1][$key] . '&rsquo;', $string);
	}

	//replace apostrophes
	$string = preg_replace("/(?<!\\\)'/", '&#8217;', $string);

	//clean up the stuff we escaped
	$string = preg_replace('/\\\"/', '"', $string);
	$string = preg_replace("/\\\'/", "'", $string);