original_string: public static function zip($zip, $check_usps = true) {
  
          $result = new \sb\Validate\Results();
          $result->value = $zip;
          $result->is_valid = false;
  
          if (preg_match("/^(\d{5})(-\d{4})*$/", $zip)) {
              $result->message = "Valid zip code format";
              $result->is_valid = true;
  
              if ($check_usps) {
  
                  $page = @file_get_contents("https://tools.usps.com/go/ZipLookupResultsAction!input.action?resultMode=2&postalCode=" . substr($zip, 0, 5));
  
                  if (!$page) {
                      $result->message .= ' cannot reach USPS site to validate zip code existence';
                  } else {
                      preg_match("~<p class=\"std-address\">(.*?)</p>~", $page, $city);
  
                      if (isset($city[1])) {
                          $data = trim($city[1]);
                          $result->state = substr($data, -2, 2);
                          $result->city = ucwords(strtolower(preg_replace("~" . $result->state . "$~", "", $data)));
                          $result->message .= " for " . $result->city . ',' . $result->state;
                      } else {
                          $result->message .= " but city not found!";
                          $result->is_valid = false;
                      }
                  }
              }
          } else {
              $result->message = "Invalid zip code format ";
          }
  
  
          return $result;
      }
code: public static function zip($zip, $check_usps = true) {
  
          $result = new \sb\Validate\Results();
          $result->value = $zip;
          $result->is_valid = false;
  
          if (preg_match("/^(\d{5})(-\d{4})*$/", $zip)) {
              $result->message = "Valid zip code format";
              $result->is_valid = true;
  
              if ($check_usps) {
  
                  $page = @file_get_contents("https://tools.usps.com/go/ZipLookupResultsAction!input.action?resultMode=2&postalCode=" . substr($zip, 0, 5));
  
                  if (!$page) {
                      $result->message .= ' cannot reach USPS site to validate zip code existence';
                  } else {
                      preg_match("~<p class=\"std-address\">(.*?)</p>~", $page, $city);
  
                      if (isset($city[1])) {
                          $data = trim($city[1]);
                          $result->state = substr($data, -2, 2);
                          $result->city = ucwords(strtolower(preg_replace("~" . $result->state . "$~", "", $data)));
                          $result->message .= " for " . $result->city . ',' . $result->state;
                      } else {
                          $result->message .= " but city not found!";
                          $result->is_valid = false;
                      }
                  }
              }
          } else {
              $result->message = "Invalid zip code format ";
          }
  
  
          return $result;
      }
code_tokens: public static function zip ( $ zip , $ check_usps = true ) { $ result = new \ sb \ Validate \ Results ( ) ; $ result -> value = $ zip ; $ result -> is_valid = false ; if ( preg_match ( "/^(\d{5})(-\d{4})*$/" , $ zip ) ) { $ result -> message = "Valid zip code format" ; $ result -> is_valid = true ; if ( $ check_usps ) { $ page = @ file_get_contents ( "https://tools.usps.com/go/ZipLookupResultsAction!input.action?resultMode=2&postalCode=" . substr ( $ zip , 0 , 5 ) ) ; if ( ! $ page ) { $ result -> message .= ' cannot reach USPS site to validate zip code existence' ; } else { preg_match ( "~<p class=\"std-address\">(.*?)</p>~" , $ page , $ city ) ; if ( isset ( $ city [ 1 ] ) ) { $ data = trim ( $ city [ 1 ] ) ; $ result -> state = substr ( $ data , - 2 , 2 ) ; $ result -> city = ucwords ( strtolower ( preg_replace ( "~" . $ result -> state . "$~" , "" , $ data ) ) ) ; $ result -> message .= " for " . $ result -> city . ',' . $ result -> state ; } else { $ result -> message .= " but city not found!" ; $ result -> is_valid = false ; } } } } else { $ result -> message = "Invalid zip code format " ; } return $ result ; }
docstring: Validates a zip code
  
  @author paul.visco@roswellpark.org
  @version 1.2 13/18/2008
  @param string $zip The zip code to validate in xxxxx or xxxxx-xxxx format
  @param boolean check_usps Check the usps sie look for validation
  
  @return \sb\Validate_Results The message property includes the city if it exists
docstring_tokens: Validates a zip code