I've tried to extract only IP addresses from the the given example input, but it extracts some text with it. Here's my code:
$spfreccord="v=spf1 include:amazonses.com include:nl2go.com include:smtproutes.com include:smtpout.com ip4:46.163.100.196 ip4:46.163.100.194 ip4:85.13.135.76 ~all";
$regexIpAddress = '/ip[4|6]:([\.\/0-9a-z\:]*)/';
preg_match($regexIpAddress, $spfreccord, $ip_match);
var_dump($ip_match);
I'm looking to match only the IPv4 IP address xxx.xxx.xxx.xxx
in each column of the table, but it looks like that the $regexIpAddress
is not correct.
Can you please help me find the correct regex to extract only the IPv4 IP addresses? Thanks.
Use the following regex:
/\d{1,3}\.\d{1,3}\.\d{1,3}\.\d{1,3}(?:\/\d{2})?/
So for this:
$spfreccord="v=spf1 include:amazonses.com include:nl2go.com include:smtproutes.com include:smtpout.com ip4:46.163.100.196 ip4:46.163.100.194 ip4:85.13.135.76 cidr class v=spf1 ip4:205.201.128.0/20 ip4:198.2.128.0/18 ~all";
$regexIpAddress = '/\d{1,3}\.\d{1,3}\.\d{1,3}\.\d{1,3}(?:\/\d{2})?/';
preg_match_all($regexIpAddress, $spfreccord, $ip_match);
var_dump($ip_match);
Gives:
array(1) {
[0]=>
array(5) {
[0]=>
string(14) "46.163.100.196"
[1]=>
string(14) "46.163.100.194"
[2]=>
string(12) "85.13.135.76"
[3]=>
string(16) "205.201.128.0/20"
[4]=>
string(14) "198.2.128.0/18"
}
}
You want preg_match_all()
, and a slight modification of your regex:
php > $regexIpAddress = '/ip4:([0-9.]+)/';
php > preg_match_all($regexIpAddress, $spfreccord, $ip_match);
php > var_dump($ip_match[1]);
array(3) {
[0]=>
string(14) "46.163.100.196"
[1]=>
string(14) "46.163.100.194"
[2]=>
string(12) "85.13.135.76"
}
php >
You don't need to match against az
; it's not a valid part of an IP address, 4 or 6. Since you said you only want IPv4, I've excluded any matching of IPv6 addresses.
If you wanted to include IPv6 as well, you can do this:
php > $regexIpAddress = '/ip[46]:([0-9a-f.:]+)/';
php > preg_match_all($regexIpAddress, $spfreccord, $ip_match);
php > var_dump($ip_match[1]);
array(4) {
[0]=>
string(14) "46.163.100.196"
[1]=>
string(14) "46.163.100.194"
[2]=>
string(12) "85.13.135.76"
[3]=>
string(39) "2001:0db8:85a3:0000:0000:8a2e:0370:7334"
}
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