Regex Patterns for European Phone Numbers, Postal Codes, VAT Numbers, Dates, Currency, Credit and Debit cards etc.
This repository contains regular expression (regex) patterns for validating phone numbers, postal codes, VAT numbers and some common and critical in various applications patterns like date, currency, credit and debit cards etc. for European countries (but not only).
Below are the patterns for each European country, along with a brief description.
- Regex Patterns
- 🇦🇩 Andorra
- 🇦🇹 Austria
- 🇧🇪 Belgium
- 🇧🇦 Bosnia and Herzegovina
- 🇧🇬 Bulgaria
- 🇭🇷 Croatia
- 🇨🇾 Cyprus
- 🇨🇿 Czech Republic
- 🇩🇰 Denmark
- 🇪🇪 Estonia
- 🇫🇮 Finland
- 🇫🇷 France
- 🇩🇪 Germany
- 🇬🇷 Greece
- 🇭🇺 Hungary
- 🇮🇪 Ireland
- 🇮🇹 Italy
- 🇱🇻 Latvia
- 🇱🇮 Liechtenstein
- 🇱🇹 Lithuania
- 🇱🇺 Luxembourg
- 🇲🇹 Malta
- 🇲🇪 Montenegro
- 🇲🇨 Monaco
- 🇳🇱 Netherlands
- 🇲🇰 North Macedonia
- 🇳🇴 Norway
- 🇵🇱 Poland
- 🇵🇹 Portugal
- 🇷🇴 Romania
- 🇸🇲 San Marino
- 🇷🇸 Serbia
- 🇸🇰 Slovakia
- 🇸🇮 Slovenia
- 🇪🇸 Spain
- 🇸🇪 Sweden
- 🇨🇭 Switzerland
- 🇬🇧 United Kingdom
- Common Patterns
- Usage
- Pattern:
^\+376[0-9]{6}$ - Description: Andorran phone numbers start with +376, followed by 6 digits.
- Pattern:
^AD\d{3}$ - Description: Andorran postal codes start with "AD" followed by 3 digits.
- Not applicable as Andorra does not have a standard VAT number system like EU countries.
- Pattern:
^\+43[1-9][0-9]{3,12}$ - Description: Austrian phone numbers start with +43, followed by a non-zero digit and 3 to 12 more digits.
- Pattern:
^\d{4}$ - Description: Austrian postal codes are made up of 4 digits.
- Pattern:
^ATU\d{8}$ - Description: Austrian VAT numbers start with "ATU", followed by 8 digits.
- Pattern:
^\+32[1-9][0-9]{7,8}$ - Description: Belgian phone numbers typically start with +32, followed by a non-zero digit and then 7 to 8 additional digits. This pattern caters to both mobile and landline numbers.
- Pattern:
^\d{4}$ - Description: Belgian postal codes consist of 4 digits. This pattern matches a sequence of exactly four numerical digits.
- Pattern:
^BE0\d{9}$ - Description: Belgian VAT numbers start with "BE0", followed by 9 digits.
- Pattern:
^\+387[6][0-9]{7}$ - Description: Bosnian phone numbers typically start with +387, followed by a 6 (indicating a mobile number) and then 7 more digits. This pattern is tailored towards mobile numbers, as they are the most commonly used.
- Pattern:
^\d{5}$ - Description: Bosnian postal codes consist of 5 digits. This pattern matches a sequence of exactly five numerical digits.
- Bosnia and Herzegovina does not have a VAT number system similar to that of the European Union. For business and tax purposes, companies use a national ID number system. It's essential to consult local regulations or authorities for accurate and specific requirements regarding tax identification and reporting in Bosnia and Herzegovina.
- Pattern:
^\+359[1-9][0-9]{7,8}$ - Description: Bulgarian phone numbers begin with +359, followed by a non-zero digit and 7 to 8 additional digits.
- Pattern:
^\d{4}$ - Description: Bulgarian postal codes consist of 4 digits.
- Pattern:
BG\d{9,10}$ - Description: Bulgarian VAT numbers start with "BG", followed by 9 or 10 digits.
- Pattern:
^\+385[1-9][0-9]{7,8}$ - Description: Croatian phone numbers start with +385, followed by a non-zero digit and 7 to 8 more digits.
- Pattern:
^\d{5}$ - Description: Croatian postal codes are made up of 5 digits.
- Pattern:
^HR\d{11}$ - Description: Croatian VAT numbers start with "HR", followed by 11 digits.
- Pattern:
^\+357[2-9][0-9]{6,7}$ - Description: Cypriot phone numbers start with +357, followed by a digit between 2 and 9, and then 6 to 7 more digits.
- Pattern:
^\d{4}$ - Description: Cypriot postal codes consist of 4 digits. This pattern matches a sequence of exactly four numerical digits.
- Pattern:
^CY\d{8}L$ - Description: Cypriot VAT numbers start with "CY", followed by 8 digits and a final letter.
- Pattern:
^\+420[1-9][0-9]{8}$ - Description: Matches Czech phone numbers. Begins with +420 and is followed by 9 digits.
- Pattern:
^\d{3}\s?\d{2}$ - Description: Matches Czech postal codes, consisting of three digits, an optional space, and two more digits.
- Pattern:
^CZ\d{8,10}$ - Description: Czech VAT numbers start with "CZ", followed by 8 to 10 digits.
- Pattern:
^\+45[2-9][0-9]{7}$ - Description: Danish phone numbers begin with +45, followed by a digit between 2 and 9, and then 7 more digits. This pattern covers the standard 8-digit format after the country code.
- Pattern:
^\d{4}$ - Description: Danish postal codes consist of 4 digits. This pattern matches a sequence of exactly four numerical digits.
- Pattern:
^DK\d{8}$ - Description: Danish VAT numbers start with "DK", followed by 8 digits.
- Pattern:
^\+372[5-9][0-9]{6,7}$ - Description: Estonian phone numbers start with +372, followed by a digit between 5
- Pattern:
^\d{5}$ - Description: Estonian postal codes consist of 5 digits.
- Pattern:
^EE\d{9}$ - Description: Estonian VAT numbers start with "EE", followed by 9 digits.
- Pattern:
^\+358[1-9][0-9]{4,11}$ - Description: Finnish phone numbers start with +358, followed by a non-zero digit, and then 4 to 11 more digits.
- Pattern:
^\d{5}$ - Description: Finnish postal codes consist of 5 digits.
- Pattern:
^FI\d{8}$ - Description: Finnish VAT numbers start with "FI", followed by 8 digits.
- Pattern:
^\+33[1-9][0-9]{8}$ - Description: Matches French phone numbers. Begins with +33 and is followed by 9 digits.
- Pattern:
^\d{5}$ - Description: French postal codes are also 5 digits in length. This pattern matches a sequence of five numerical digits.
- Pattern:
^FR[A-HJ-NP-Z0-9]{2}\d{9}$ - Description: French VAT numbers start with "FR", followed by two characters (either digits or letters except O and I) and then 9 digits.
- Pattern:
^\+49[1-9][0-9]{1,14}$ - Description: Matches German phone numbers. Begins with +49 and is followed by 9 to 15 digits.
- Pattern:
^\d{5}$ - Description: German postal codes consist of 5 digits. This pattern matches a sequence of exactly five numerical digits.
- Pattern:
^DE\d{9}$ - Description: German VAT numbers start with "DE", followed by 9 digits.
- Pattern:
^\+30[2-9][0-9]{9}$ - Description: Matches Greek phone numbers. Begins with +30, followed by a digit from 2 to 9, and then 9 more digits.
- Pattern:
^\d{3}\s?\d{2}$ - Description: Matches Greek postal codes, consisting of three digits, an optional space, and two more digits.
- Pattern:
^EL\d{9}$ - Description: Greek VAT numbers start with "EL", followed by 9 digits.
- Pattern:
^\+36[1-9][0-9]{8}$ - Description: Hungarian phone numbers begin with +36, followed by a non-zero digit and 8 additional digits.
- Pattern:
^\d{4}$ - Description: Hungarian postal codes consist of 4 digits.
- Pattern:
^HU\d{8}$ - Description: Hungarian VAT numbers start with "HU", followed by 8 digits.
- Pattern:
^\+353[1-9][0-9]{6,9}$ - Description: Irish phone numbers begin with +353, followed by a non-zero digit, and then 6 to 9 more digits.
- Pattern:
^(D6W|[A-Z]{1}[0-9]{1,2}|[A-Z]{2}[0-9]{1,2}|[A-Z]{1}[0-9]{1}[A-Z]{1}|[A-Z]{2}[0-9]{1}[A-Z]{1})$ - Description: Irish postal codes (Eircode) are alphanumeric and follow several formats, including Dublin postal districts (e.g., D6W).
- Pattern:
^IE\d{7}[A-WY][A-I]?|IE[0-9+][A-Z+][0-9]{5}[A-WY]$ - Description: Irish VAT numbers start with "IE", followed by 7 digits and one or two letters. Variants include an additional character before the last digit for newer numbers.
- Pattern:
^\+39[0-9]{6,12}$ - Description: Matches Italian phone numbers, beginning with +39 and followed by 6 to 12 digits.
- Pattern:
^\d{5}$ - Description: Matches Italian postal codes, which consist of 5 digits.
- Pattern:
^IT\d{11}$ - Description: Italian VAT numbers start with "IT", followed by 11 digits.
- Pattern:
^\+371[2-9][0-9]{7}$ - Description: Latvian phone numbers begin with +371, followed by a digit between 2
- Pattern:
^LV-\d{4}$ - Description: Latvian postal codes start with "LV-" followed by 4 digits.
- Pattern:
^LV\d{11}$ - Description: Latvian VAT numbers start with "LV", followed by 11 digits.
- Pattern:
^\+423[0-9]{3,12}$ - Description: Liechtenstein phone numbers start with +423, followed by 3 to 12 digits.
- Pattern:
^\d{4}$ - Description: Liechtenstein postal codes are made up of 4 digits.
- Pattern:
^LI\d{5}$ - Description: Liechtenstein VAT numbers start with "LI", followed by 5 digits. The country uses a simpler system due to its smaller size.
- Pattern:
^\+370[6-9][0-9]{7}$ - Description: Lithuanian phone numbers start with +370, followed by a digit between 6 and 9, and then 7 more digits.
- Pattern:
^LT-\d{5}$ - Description: Lithuanian postal codes start with "LT-" followed by 5 digits.
- Pattern:
^LT\d{9,12}$ - Description: Lithuanian VAT numbers start with "LT", followed by 9 or 12 digits.
- Pattern:
^\+352[0-9]{3,11}$ - Description: Luxembourg phone numbers start with +352, followed by 3 to 11 digits.
- Pattern:
^\d{4}$ - Description: Luxembourg postal codes consist of 4 digits.
- Pattern:
^LU\d{8}$ - Description: Luxembourg VAT numbers start with "LU", followed by 8 digits.
- Pattern:
^\+356[0-9]{8}$ - Description: Malta phone numbers begin with +356, followed by 8 digits.
- Pattern:
^[A-Z]{3}\s?\d{2,4}$ - Description: Maltese postal codes consist of three letters followed by a space (optional) and 2 to 4 digits.
- Pattern:
^MT\d{8}$ - Description: Maltese VAT numbers start with "MT", followed by 8 digits.
- Pattern:
^\+382[6-9][0-9]{6,7}$ - Description: Montenegrin phone numbers typically start with +382, followed by a digit between 6 and 9, and then 6 to 7 more digits. This pattern covers both mobile and landline numbers.
- Pattern:
^\d{5}$ - Description: Montenegrin postal codes consist of 5 digits. This pattern matches a sequence of exactly five numerical digits.
- Pattern:
^ME\d{8}$ - Description: Montenegrin VAT numbers start with "ME", followed by 8 digits. Montenegro, not being an EU member, has its own VAT system.
- Pattern:
^\+377[0-9]{8,9}$ - Description: Monaco phone numbers begin with +377, followed by 8 to 9 digits.
- Pattern:
^980\d{2}$ - Description: Monaco postal codes start with 980 followed by two additional digits.
- Monaco does not have a distinct VAT number system and uses the French VAT system. Businesses in Monaco typically use French VAT numbers, which start with "FR", followed by two characters (either digits or letters except O and I) and then 9 digits.
- Pattern:
^\+31[0-9]{9}$ - Description: Matches Dutch phone numbers. Begins with +31 and is followed by 9 digits.
- Pattern:
^[1-9][0-9]{3}\s?[A-Z]{2}$ - Description: Matches Dutch postal codes, which consist of four digits followed by two letters.
- Pattern:
^NL\d{9}B\d{2}$ - Description: Dutch VAT numbers start with "NL", followed by 9 digits, "B", and 2 more digits.
- Pattern:
^\+389[2-9][0-9]{6,7}$ - Description: North Macedonian phone numbers begin with +389, followed by a digit between 2 and 9, and then 6 to 7 additional digits.
- Pattern:
^\d{4}$ - Description: North Macedonian postal codes consist of 4 digits. This pattern matches a sequence of exactly four numerical digits.
- Pattern:
^MK\d{13}$ - Description: North Macedonian VAT numbers start with "MK", followed by 13 digits. This format reflects the country's specific tax identification system.
- Pattern:
^\+47[2-9][0-9]{7,8}$ - Description: Norwegian phone numbers begin with +47, followed by a digit between 2 and 9, and then 7 to 8 additional digits.
- Pattern:
^\d{4}$ - Description: Norwegian postal codes consist of 4 digits.
- Pattern:
^NO\d{9}MVA$ - Description: Norwegian VAT numbers start with "NO", followed by 9 digits and end with "MVA" (which stands for "Merverdiavgift", the Norwegian term for VAT).
- Pattern:
^\+48[0-9]{9}$ - Description: Matches Polish phone numbers, beginning with +48 and followed by 9 digits.
- Pattern:
^\d{2}-\d{3}$ - Description: Matches Polish postal codes, which consist of two digits, a hyphen, and three more digits.
- Pattern:
^PL\d{10}$ - Description: Polish VAT numbers start with "PL", followed by 10 digits.
- Pattern:
^\+351[1-9][0-9]{8}$ - Description: Matches Portuguese phone numbers. Begins with +351 and is followed by 9 digits.
- Pattern:
^\d{4}-\d{3}$ - Description: Matches Portuguese postal codes, which consist of four digits, a hyphen, and three more digits.
- Pattern:
^PT\d{9}$ - Description: Portuguese VAT numbers start with "PT", followed by 9 digits.
- Pattern:
^\+40[1-9][0-9]{8,9}$ - Description: Romanian phone numbers start with +40, followed by a non-zero digit and 8 to 9 more digits.
- Pattern:
^\d{6}$ - Description: Romanian postal codes are made up of 6 digits.
- Pattern:
^RO\d{2,10}$ - Description: Romanian VAT numbers start with "RO", followed by between 2 and 10 digits.
- Pattern:
^\+378[0-9]{6,10}$ - Description: San Marino phone numbers start with +378, followed by 6 to 10 digits.
- Pattern:
^4789\d$ - Description: San Marino postal codes are "4789" followed by one digit.
- Pattern:
^SM\d{5}$ - Description: San Marino VAT numbers start with "SM", followed by 5 digits. Despite its size, San Marino has its own VAT system separate from Italy.
- Pattern:
^\+381[6-9][0-9]{6,8}$ - Description: Serbian phone numbers start with +381, followed by a digit between 6 and 9, and then 6 to 8 more digits.
- Pattern:
^\d{5}$ - Description: Serbian postal codes consist of 5 digits. This pattern matches a sequence of exactly five numerical digits.
- Pattern:
^RS\d{9}$ - Description: Serbian VAT numbers start with "RS", followed by 9 digits. Serbia, not being an EU member, has its own VAT registration system.
- Pattern:
^\+421[1-9][0-9]{8}$ - Description: Slovak phone numbers begin with +421, followed by a non-zero digit and 8 additional digits.
- Pattern:
^\d{3}\s?\d{2}$ - Description: Slovak postal codes have 5 digits, typically written with a space after the first three digits.
- Pattern:
^SK\d{10}$ - Description: Slovak VAT numbers start with "SK", followed by 10 digits.
- Pattern:
^\+386[1-9][0-9]{6,7}$ - Description: Slovenian phone numbers start with +386, followed by a non-zero digit and 6 to 7 additional digits.
- Pattern:
^\d{4}$ - Description: Slovenian postal codes consist of 4 digits.
- Pattern:
^SI\d{8}$ - Description: Slovenian VAT numbers start with "SI", followed by 8 digits.
- Pattern:
^\+34[6-9][0-9]{8}$ - Description: Matches Spanish phone numbers. Begins with +34, followed by a digit from 6 to 9, and then 8 more digits.
- Pattern:
^\d{5}$ - Description: Matches Spanish postal codes, which consist of 5 digits.
- Pattern:
^ES[A-Z]\d{7}[A-Z]$|^ES[A-Z][0-9]{7}[0-9A-Z]$|^ES[0-9]{8}[A-Z]$ - Description: Spanish VAT numbers start with "ES", followed by various formats including a letter, 7 digits, then a letter; or 8 digits then a letter.
- Pattern:
^\+46[0-9]{7,13}$ - Description: Matches Swedish phone numbers. Begins with +46 and is followed by 7 to 13 digits.
- Pattern:
^\d{3}\s?\d{2}$ - Description: Matches Swedish postal codes, consisting of three digits, an optional space, and two more digits.
- Pattern:
^SE\d{12}$ - Description: Swedish VAT numbers start with "SE", followed by 12 digits.
- Pattern:
^\+41[1-9][0-9]{8}$ - Description: Swiss phone numbers begin with +41, followed by a non-zero digit and 8 additional digits.
- Pattern:
^\d{4}$ - Description: Swiss postal codes consist of 4 digits.
- Pattern:
^CHE\d{9}MWST|TVA|IVA$ - Description: Swiss VAT numbers start with "CHE", followed by 9 digits and end with "MWST", "TVA", or "IVA", depending on the language region (German, French, or Italian for VAT).
- Pattern:
^\+44[1-9][0-9]{9,10}$ - Description: UK phone numbers start with +44, followed by a digit between 1 and 9, and then 9 to 10 additional digits. This pattern covers various formats including landlines, mobiles, and other services.
- Pattern:
^(GIR ?0AA|[A-Z]{1,2}[0-9]{1,2} ?[0-9][A-Z]{2})$ - Description: Matches UK postal codes.
- Pattern:
^GB\d{9}$|^GB\d{12}$|^GBGD\d{3}$|^GBHA\d{3}$ - Description: UK VAT numbers start with "GB", followed by either 9 digits, 12 digits, or specific codes like "GD" or "HA" for government departments and health authorities, respectively. Despite Brexit, the UK continues to use a VAT system similar to that of the EU.
European date formats typically use the day-month-year format, which differs from the month-day-year format used in the United States.
A regex pattern to match this format can look like this: ^(0?[1-9]|[12][0-9]|3[01])/(0?[1-9]|1[012])/\d{4}$
This pattern checks for a valid day (01 to 31), month (01 to 12), and a 4-digit year. The 0? allows for dates to be written with or without a leading zero (e.g., "1/1/2024" or "01/01/2024").
To match amounts in euros, which might include commas for thousands separators and a period for the decimal point, you can use the following pattern: ^€\s?\d{1,3}(,\d{3})*(\.\d{2})?$
This pattern supports amounts like "€1,000.00", "€100", and "€ 2,500.50". It ensures there is a euro symbol at the beginning, optional whitespace, followed by a number that may include commas and exactly two decimal places.
Vehicle registration codes in Europe can vary, but a simple pattern to match a generic format might be: ^[A-Z]{1,3}-\d{1,4}-[A-Z]{1,3}$
This pattern allows for 1 to 3 letters, followed by 1 to 4 digits, and then 1 to 3 letters again, all separated by dashes. This format matches some European vehicle registration codes but might need adjustments for specific countries.
Below are regex patterns for various types of credit and debit cards. These patterns match the general format of card numbers issued by major card providers.
Keep in mind that these patterns only validate the format, not the actual validity of the card numbers.
- Pattern:
^4[0-9]{12}(?:[0-9]{3})?$ - Description: Visa cards start with a 4 and have either 13 or 16 digits.
- Pattern:
^5[1-5][0-9]{14}$ - Description: MasterCard numbers start with digits 51 through 55 and have 16 digits.
- Pattern:
^3[47][0-9]{13}$ - Description: American Express card numbers start with 34 or 37 and have 15 digits.
- Pattern:
^6(?:011|5[0-9]{2})[0-9]{12}$ - Description: Discover cards start with 6011 or 65 and have 16 digits.
- Pattern:
^3(?:0[0-5]|[68][0-9])[0-9]{11}$ - Description: Diners Club cards start with 300-305, 36, or 38 and have 14 digits.
- Pattern:
^(?:2131|1800|35\d{3})\d{11}$ - Description: JCB cards start with 2131, 1800, or 35 and have 15 or 16 digits.
- Pattern:
^(?:5[0678]\d{2}|6\d{3})\d{8,15}$ - Description: Maestro cards have 12 to 19 digits and start with 50, 56-69.
- Pattern:
^62[0-9]{14,17}$ - Description: UnionPay cards start with 62 and have 16 to 19 digits.
To use regex patterns in PHP, we can use the preg_match function.
Here's an example of how to validate a German phone number:
$pattern = '/^\+49[1-9][0-9]{1,14}$/';
$phoneNumber = '+491234567890';
if (preg_match($pattern, $phoneNumber)) {
echo "Valid German phone number.";
} else {
echo "Invalid German phone number.";
}Here's an example of how to validate a credit card number:
$patterns = [
'visa' => '/^4[0-9]{12}(?:[0-9]{3})?$/',
'mastercard' => '/^5[1-5][0-9]{14}$/',
'amex' => '/^3[47][0-9]{13}$/',
'discover' => '/^6(?:011|5[0-9]{2})[0-9]{12}$/',
'diners' => '/^3(?:0[0-5]|[68][0-9])[0-9]{11}$/',
'jcb' => '/^(?:2131|1800|35\d{3})\d{11}$/',
'maestro' => '/^(?:5[0678]\d{2}|6\d{3})\d{8,15}$/',
'unionpay' => '/^62[0-9]{14,17}$/'
];
$cardNumber = '4111111111111111'; // example Visa card number
foreach ($patterns as $type => $pattern) {
if (preg_match($pattern, $cardNumber)) {
echo "Valid $type card number.";
break;
}
}To use regex patterns in Python, we can use the re module, which provides support for regular expressions.
Here's an example of how to validate a German phone number:
import re
# Regex pattern for a German phone number
pattern = r'^\+49[1-9][0-9]{1,14}$'
# Sample German phone number to test
phone_number = '+491234567890'
# Using the re.match function to check if the pattern matches the phone number
if re.match(pattern, phone_number):
print("Valid German phone number.")
else:
print("Invalid German phone number.")Here's an example of how to validate a credit card number:
import re
patterns = {
'visa': r'^4[0-9]{12}(?:[0-9]{3})?$',
'mastercard': r'^5[1-5][0-9]{14}$',
'amex': r'^3[47][0-9]{13}$',
'discover': r'^6(?:011|5[0-9]{2})[0-9]{12}$',
'diners': r'^3(?:0[0-5]|[68][0-9])[0-9]{11}$',
'jcb': r'^(?:2131|1800|35\d{3})\d{11}$',
'maestro': r'^(?:5[0678]\d{2}|6\d{3})\d{8,15}$',
'unionpay': r'^62[0-9]{14,17}$'
}
card_number = '4111111111111111' # example Visa card number
for card_type, pattern in patterns.items():
if re.match(pattern, card_number):
print(f"Valid {card_type} card number.")
breakIn C#, we can use the System.Text.RegularExpressions namespace to work with regex.
Here's an example of how to validate a German phone number:
using System;
using System.Text.RegularExpressions;
class Program
{
static void Main()
{
string pattern = @"^\+49[1-9][0-9]{1,14}$";
string phoneNumber = "+491234567890";
if (Regex.IsMatch(phoneNumber, pattern))
{
Console.WriteLine("Valid German phone number.");
}
else
{
Console.WriteLine("Invalid German phone number.");
}
}
}Here's an example of how to validate a credit card number:
using System;
using System.Text.RegularExpressions;
class Program
{
static void Main()
{
var patterns = new (string CardType, string Pattern)[]
{
("Visa", @"^4[0-9]{12}(?:[0-9]{3})?$"),
("MasterCard", @"^5[1-5][0-9]{14}$"),
("Amex", @"^3[47][0-9]{13}$"),
("Discover", @"^6(?:011|5[0-9]{2})[0-9]{12}$"),
("Diners", @"^3(?:0[0-5]|[68][0-9])[0-9]{11}$"),
("JCB", @"^(?:2131|1800|35\d{3})\d{11}$"),
("Maestro", @"^(?:5[0678]\d{2}|6\d{3})\d{8,15}$"),
("UnionPay", @"^62[0-9]{14,17}$")
};
string cardNumber = "4111111111111111"; // example Visa card number
foreach (var (CardType, Pattern) in patterns)
{
if (Regex.IsMatch(cardNumber, Pattern))
{
Console.WriteLine($"Valid {CardType} card number.");
break;
}
}
}
}In Java, regex functionalities are provided by the java.util.regex package.
Here's an example of how to validate a German phone number:
import java.util.regex.Matcher;
import java.util.regex.Pattern;
public class Main {
public static void main(String[] args) {
String pattern = "^\+49[1-9][0-9]{1,14}$";
String phoneNumber = "+491234567890";
Pattern r = Pattern.compile(pattern);
Matcher m = r.matcher(phoneNumber);
if (m.find()) {
System.out.println("Valid German phone number.");
} else {
System.out.println("Invalid German phone number.");
}
}
}Here's an example of how to validate a credit card number:
import java.util.regex.Matcher;
import java.util.regex.Pattern;
public class Main {
public static void main(String[] args) {
String[][] patterns = {
{"Visa", "^4[0-9]{12}(?:[0-9]{3})?$"},
{"MasterCard", "^5[1-5][0-9]{14}$"},
{"Amex", "^3[47][0-9]{13}$"},
{"Discover", "^6(?:011|5[0-9]{2})[0-9]{12}$"},
{"Diners", "^3(?:0[0-5]|[68][0-9])[0-9]{11}$"},
{"JCB", "^(?:2131|1800|35\\d{3})\\d{11}$"},
{"Maestro", "^(?:5[0678]\\d{2}|6\\d{3})\\d{8,15}$"},
{"UnionPay", "^62[0-9]{14,17}$"}
};
String cardNumber = "4111111111111111"; // example Visa card number
for (String[] pattern : patterns) {
Pattern r = Pattern.compile(pattern[1]);
Matcher m = r.matcher(cardNumber);
if (m.find()) {
System.out.println("Valid " + pattern[0] + " card number.");
break;
}
}
}
}Ruby has built-in support for regular expressions.
Here's an example of how to validate a German phone number:
pattern = /^\+49[1-9][0-9]{1,14}$/
phone_number = "+491234567890"
if phone_number.match(pattern)
puts "Valid German phone number."
else
puts "Invalid German phone number."
endHere's an example of how to validate a credit card number:
patterns = {
'visa' => /^4[0-9]{12}(?:[0-9]{3})?$/,
'mastercard' => /^5[1-5][0-9]{14}$/,
'amex' => /^3[47][0-9]{13}$/,
'discover' => /^6(?:011|5[0-9]{2})[0-9]{12}$/,
'diners' => /^3(?:0[0-5]|[68][0-9])[0-9]{11}$/,
'jcb' => /^(?:2131|1800|35\d{3})\d{11}$/,
'maestro' => /^(?:5[0678]\d{2}|6\d{3})\d{8,15}$/,
'unionpay' => /^62[0-9]{14,17}$/
}
card_number = "4111111111111111" # example Visa card number
patterns.each do |type, pattern|
if card_number.match(pattern)
puts "Valid #{type} card number."
break
end
endHere's an example of how to validate a German phone number:
const pattern = /^\+49[1-9][0-9]{1,14}$/;
const phoneNumber = '+491234567890';
if (pattern.test(phoneNumber)) {
console.log("Valid German phone number.");
} else {
console.log("Invalid German phone number.");
}Here's an example of how to validate a credit card number:
const patterns = {
visa: /^4[0-9]{12}(?:[0-9]{3})?$/,
mastercard: /^5[1-5][0-9]{14}$/,
amex: /^3[47][0-9]{13}$/,
discover: /^6(?:011|5[0-9]{2})[0-9]{12}$/,
diners: /^3(?:0[0-5]|[68][0-9])[0-9]{11}$/,
jcb: /^(?:2131|1800|35\d{3})\d{11}$/,
maestro: /^(?:5[0678]\d{2}|6\d{3})\d{8,15}$/,
unionpay: /^62[0-9]{14,17}$/
};
const cardNumber = '4111111111111111'; // example Visa card number
for (let type in patterns) {
if (patterns[type].test(cardNumber)) {
console.log(`Valid ${type} card number.`);
break;
}
}The regex patterns provided here are examples and may not cover all cases or nuances of phone number, postal code, VAT number and vehicle registration code formats. You would need to research and verify the patterns for each country.
Also, remember that phone number, postal code, VAT number and vehicle registration code formats can change, so it's good practice to periodically review and update these patterns.
Be sure to test thoroughly and adjust the patterns as necessary to fit your specific requirements.
We welcome contributions from the community! If you would like to contribute, please fork the repository, make changes, and submit a pull request. You can also open an issue to discuss potential changes or add new patterns.
If you have any questions, feel free to reach out.
This project is released under the MIT License.
