Parsing tags

[goobers]

Hi,

I was wondering if anyone can help me parse tags.

This is what I currently do:

		$tags = strtolower($tag_string);
		$tags = preg_replace("/[^A-Za-z0-9 '_-]/","",$tags);
		// remove superfluous whitespace
		$tags = preg_replace("/\s\s+/", " ", $tags);
		$tags_array = explode(' ', $tags);
		$tags_array = array_filter($tags_array);

However, What i want to do, is account for tags in double quotes.

For example if I have the following string:

"My dog has four legs" (minus the quotes) I would get an array with each of those words as an element.

Now if I had the following tags:

" apple fruit "good food" citrus"

I want to array to contain :
apple
fruit
good food <-- this should be as a single tag
citrus

can anyone guide me on how to do that ?

Thanks