$re = '/^(?<street>(?!\d+ )[\p{L}\d\'\u2018-\u2019]+\.?(?:[ -][\p{L}\d\'\u2018-\u2019]+\.?)*(?<! \d+)),? (?<houseNumber>[1-9\p{L}][\d\p{L}]*(?:(?: | ?[\-/+,] ?)[\d\p{L}]+)*?)$/um';
$str = 'Test-Straße 1
Chaussée de Tirlemont 373
Mühlenstraße 23
Straße des 17. Juni 135
4th Street 12ab
3rd Avenue 1435
Hamburger Str. 11-19
K4 12
Test-Str. 12ab
Test-Str. 12a-d
Test Str. 51 16
Test-Str. 17/18
Test Str. QA/3/31
Test Str. 51 / XX / 31';
preg_match_all($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