CAP italiano (Codice di Avviamento Postale)

^\d{5}$

• JavaScript (ES6+)
• PHP 8.2+ (PCRE)
• Python 3
• Go (regexp)
• C# / .NET

// JavaScript (ES6+)
const regex = /^\d{5}$/;
const isValid = regex.test(text);

// Estrazione match
const matches = text.match(regex);

<?php
// PHP 8.2+ (PCRE)
$pattern = '~^\d{5}$~';
$isValid = (bool) preg_match($pattern, $text);

// Estrazione con gruppi
if (preg_match($pattern, $text, $matches)) {
    print_r($matches);
}

# Python 3 (re)
import re

pattern = r"^\d{5}$"
is_valid = bool(re.search(pattern, text))

# Estrazione match
match = re.search(pattern, text)
if match:
    print(match.group(0))

// Go (regexp)
package main

import (
	"fmt"
	"regexp"
)

func main() {
	re := regexp.MustCompile(`^\d{5}$`)
	isValid := re.MatchString(text)
	fmt.Println(isValid)
}

// C# (.NET)
using System;
using System.Text.RegularExpressions;

bool isValid = Regex.IsMatch(text, @"^\d{5}$");