$re = '/<span [^>]*>(\d+)\D(\d+)\D[^<]*/m';
$str = '<span class="value">
Price:<br>
<span style="color:white">23,07€ </span>
</span>';
preg_match_all($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