Parse a wordpress shortcode into a PHP array

gistfile1.php

function get_atts_from_shortcode_with_a_good_old_regex($content) {
	$regexp = '/(.?)\[(shop)\b(.*?)(?:(\/))?\](?:(.+?)\[\/\2\])?(.?)/s';
	$m = array();
	preg_match($regexp, $content, $m);
	$arr = array('content' => $m[5]);
	$arr = array_merge(shortcode_parse_atts($m[3]),$arr);
	return $arr;
}