Ip Address Ipv4 Input Validation - Cpp

// ip address ipv4 input validation - JavaScript
const regex = /^(?:(?:25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)\.){3}(?:25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)$/;

function validate(input) {
  if (!input || typeof input !== 'string') return false;
  return regex.test(input.trim());
}

// Usage examples
console.log(validate('192.168.1.1')); // true
console.log(validate('256.256.256.256')); // false

# ip address ipv4 input validation - Python
import re

pattern = r"^(?:(?:25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)\.){3}(?:25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)$"
regex = re.compile(pattern)

def validate(input_str):
    if not input_str or not isinstance(input_str, str):
        return False
    return bool(regex.match(input_str.strip()))

# Usage examples
print(validate('192.168.1.1'))  # True
print(validate('256.256.256.256'))  # False

<?php
// ip address ipv4 input validation - PHP
function validate($input) {
    if (!is_string($input) || empty(trim($input))) {
        return false;
    }
    
    $pattern = '/^(?:(?:25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)\.){3}(?:25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)$/';
    return preg_match($pattern, trim($input)) === 1;
}

// Usage examples
var_dump(validate('192.168.1.1')); // bool(true)
var_dump(validate('256.256.256.256')); // bool(false)
?>