$re = '/^(\d|\[\d-\d\]| )+$/m';
$str = '0[1-3]123 45
[1-3]123 45
05[1-3]123 45
0[1-3]555 6789
0332 555 6789
0[1-11]123 45
[1-3]123a 34
[0-5]212123 45 67
[0-5]21223 45 67
[0-5]21223 45 67
1231232131 ';
preg_match_all($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