Extract house numbers from address string

php regex street-address

PHP Snippet 1:

preg_match_all('!\s(\d.*)!', 'streetname 60/2/3', $matches);

PHP Snippet 2:

function getStreetNumberFromStreetAddress($streetAddress){
  $array = explode(' ',$streetAddress);

  if (count($array) > 0){
    foreach($array as $a){
      if (is_numeric($a[0])){
        return $a;
      }
    }
  }
  return null;
}