|
1
|
|
|
<?php |
|
2
|
|
|
|
|
3
|
|
|
declare(strict_types=1); |
|
4
|
|
|
|
|
5
|
|
|
namespace Yiisoft\NetworkUtilities; |
|
6
|
|
|
|
|
7
|
|
|
use RuntimeException; |
|
8
|
|
|
|
|
9
|
|
|
final class DnsHelper |
|
10
|
|
|
{ |
|
11
|
|
|
/** |
|
12
|
|
|
* @param string $hostname hostname without dot at end |
|
13
|
|
|
* |
|
14
|
|
|
* @return bool |
|
15
|
|
|
*/ |
|
16
|
3 |
|
public static function existsMx(string $hostname): bool |
|
17
|
|
|
{ |
|
18
|
|
|
/** @psalm-suppress InvalidArgument, MixedArgumentTypeCoercion */ |
|
19
|
3 |
|
set_error_handler( |
|
20
|
3 |
|
static function (int $errorNumber, string $errorString) use ($hostname): ?bool { |
|
21
|
1 |
|
throw new RuntimeException( |
|
22
|
1 |
|
sprintf('Failed to get DNS record "%s". ', $hostname) . $errorString, |
|
23
|
|
|
$errorNumber |
|
24
|
|
|
); |
|
25
|
3 |
|
} |
|
26
|
|
|
); |
|
27
|
3 |
|
$hostname = rtrim($hostname, '.') . '.'; |
|
28
|
3 |
|
$result = dns_get_record($hostname, DNS_MX); |
|
29
|
|
|
|
|
30
|
2 |
|
restore_error_handler(); |
|
31
|
|
|
|
|
32
|
2 |
|
return count($result) > 0; |
|
33
|
|
|
} |
|
34
|
|
|
|
|
35
|
|
|
/** |
|
36
|
|
|
* @param string $hostname |
|
37
|
|
|
* |
|
38
|
|
|
* @return bool |
|
39
|
|
|
*/ |
|
40
|
3 |
|
public static function existsA(string $hostname): bool |
|
41
|
|
|
{ |
|
42
|
|
|
/** @psalm-suppress InvalidArgument, MixedArgumentTypeCoercion */ |
|
43
|
3 |
|
set_error_handler( |
|
44
|
3 |
|
static function (int $errorNumber, string $errorString) use ($hostname): ?bool { |
|
45
|
1 |
|
throw new RuntimeException( |
|
46
|
1 |
|
sprintf('Failed to get DNS record "%s". ', $hostname) . $errorString, |
|
47
|
|
|
$errorNumber |
|
48
|
|
|
); |
|
49
|
3 |
|
} |
|
50
|
|
|
); |
|
51
|
|
|
|
|
52
|
3 |
|
$result = dns_get_record($hostname, DNS_A); |
|
53
|
|
|
|
|
54
|
2 |
|
restore_error_handler(); |
|
55
|
|
|
|
|
56
|
2 |
|
return count($result) > 0; |
|
57
|
|
|
} |
|
58
|
|
|
|
|
59
|
|
|
/** |
|
60
|
|
|
* @link https://tools.ietf.org/html/rfc5321#section-5 |
|
61
|
|
|
* |
|
62
|
|
|
* @param string $hostnameOrEmail |
|
63
|
|
|
* |
|
64
|
|
|
* @return bool |
|
65
|
|
|
*/ |
|
66
|
1 |
|
public static function acceptsEmails(string $hostnameOrEmail): bool |
|
67
|
|
|
{ |
|
68
|
1 |
|
if (strpos($hostnameOrEmail, '@') !== false) { |
|
69
|
1 |
|
[, $hostnameOrEmail] = explode('@', $hostnameOrEmail, 2); |
|
70
|
|
|
} |
|
71
|
1 |
|
return self::existsMx($hostnameOrEmail) || self::existsA($hostnameOrEmail); |
|
72
|
|
|
} |
|
73
|
|
|
} |
|
74
|
|
|
|
yiisoft /
network-utilities
