$re = '/^\$?(\d+(?:\s\d+)*(?:[\.\,]\d{1,2})?)\s?\$?$/m';
$str = '12,00$
122.04$
12123123
1 200$
1 200,22$';
preg_match_all($re, $str, $matches, PREG_SET_ORDER, 0);
// Print the entire match result
var_dump($matches);
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