$re = '/(\d+)[^\d]+some[wW]ord/';
$str = '43434 of someword 12 anything 45 someword 2323 new someword
43434 of someWord 12 anything someWord 2323 new someWord';
preg_match_all($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