$re = '/([0-9]+(\.[0-9]{2})?)\|((?:[A-Z]{2}[+*]?([0-9]+)?[+*]?([0-9]+)?,?)(?:[A-Z]{2}[+*]?([0-9]+)?[*+]?([0-9]+)?,?[A-Z]{2}?[*+]?([0-9]+)?[+*]?([0-9]+)?)?)(\s+"(.+?)")?/m';
$str = '62.00|LQ+2*2,FP,MD*3
30|LQ "Burgers"
35.15|LQ*2,FP+2*4,MD*3+4 "Potatoes"
35.15|LQ,FP,MD';
$subst = "(\1) (\3) (\11)";
$result = preg_replace($re, $subst, $str);
echo "The result of the substitution is ".$result;
Please keep in mind that these code samples are automatically generated and are not guaranteed to work. If you find any syntax errors, feel free to submit a bug report. For a full regex reference for PHP, please visit: http://php.net/manual/en/ref.pcre.php