<?php
namespace HeroQR\DataTypes;
use HeroQR\Contracts\DataTypes\AbstractDataType;
/**
* Provides robust validation for email addresses.
*
* Validates format, applies a regex, checks domain MX/A records,
* and blocks blacklisted domains.
*/
class EmailValidator extends AbstractDataType
{
public static function validate(string $data): bool
{
$email = trim($data);
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;
}
$domain = strtolower(substr(strrchr($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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