<?php
namespace HeroQR\DataTypes;
use HeroQR\Contracts\DataTypes\AbstractDataType;
/**
* Class Email
*
* This class provides robust validation for email addresses. It includes:
* - Validating the email format using PHP's `FILTER_VALIDATE_EMAIL`.
* - Using a regex pattern to ensure a proper email structure.
* - Checking for the existence of an MX record for the email domain.
* - Validating the domain against a predefined blacklist.
* - Normalizing the domain to handle case-insensitivity.
*
* @package HeroQR\DataTypes
*/
class Email extends AbstractDataType
{
public static function validate(string $email): bool
{
if (!filter_var($email, FILTER_VALIDATE_EMAIL)) {
return false;
}
if (!preg_match('/^[a-zA-Z0-9._%+-]+@[a-zA-Z0-9.-]+\.[a-zA-Z]{2,}$/', $email)) {
return false;
}
$domain = substr(strrchr($email, '@'), 1);
$blacklist = ['example.com', 'test.com', 'invalid.com', 'nonexistentdomain.xyz'];
foreach ($blacklist as $blockedDomain) {
if (str_ends_with($domain, $blockedDomain)) {
return false;
}
}
if (!checkdnsrr($domain, 'MX') && !checkdnsrr($domain, 'A')) {
return false;
}
return true;
}
}
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