Php Get Dns Nameserver , Cname , Mx , a Records of a Domain

PHP get DNS Nameserver , Cname , MX , A records of a domain
by Janeth Kent Date: 11-04-2013


 

PHP has a useful function called dns_get_record that can be used to get different types of records for a give domain , very easily.

Nameserver - NS Records :

$ php -a
Interactive shell

php > print_r(dns_get_record('www.binarytides.com' , DNS_NS));
Array
(
    [0] => Array
        (
            [host] => binarytides.com
            [type] => NS
            [target] => omikro1.allwebserver.com
            [class] => IN
            [ttl] => 86140
        )

    [1] => Array
        (
            [host] => binarytides.com
            [type] => NS
            [target] => omikro2.allwebserver.com
            [class] => IN
            [ttl] => 86140
        )

)
php > 

A Record - IP address :

php > print_r(dns_get_record('www.binarytides.com' , DNS_A));
Array
(
    [0] => Array
        (
            [host] => binarytides.com
            [type] => A
            [ip] => 64.131.72.23
            [class] => IN
            [ttl] => 14046
        )

)
php > 

Another simple method to get the A record or IP address of a domain name is to use the function gethostbyname :

php > print_r(gethostbyname('www.binarytides.com'));
64.131.72.23
php >

Another method gethostbynamel would give an array of IPs :

php > print_r(gethostbynamel('www.google.com'));
Array
(
    [0] => 74.125.71.147
    [1] => 74.125.71.99
    [2] => 74.125.71.104
    [3] => 74.125.71.106
    [4] => 74.125.71.105
    [5] => 74.125.71.103
)
php > 

MX Record - Mail Server :

MX Records give the mail server for a given domain. These mail servers can be used to send mails to a certain email on that domain say [email protected]

php > print_r(dns_get_record('www.binarytides.com' , DNS_MX));
Array
(
    [0] => Array
        (
            [host] => binarytides.com
            [type] => MX
            [pri] => 0
            [target] => binarytides.com
            [class] => IN
            [ttl] => 14400
        )

)
php > 

For MX records there is an alternative function called getmxrr , which can be used like this :

php > getmxrr('www.binarytides.com' , $mxhosts);
php > print_r($mxhosts);
Array
(
    [0] => binarytides.com
)
php >

It returns an array of mxhosts for a given hostname/domain.

CNAME Records - Canonical Alias :

php > print_r(dns_get_record('www.binarytides.com' , DNS_CNAME));
Array
(
    [0] => Array
        (
            [host] => www.binarytides.com
            [type] => CNAME
            [target] => binarytides.com
            [class] => IN
            [ttl] => 13932
        )

)
php > 

With the DNS_ALL option you can get all the above information at once :

php > print_r(dns_get_record('www.binarytides.com' , DNS_ALL));
Array
(
    [0] => Array
        (
            [host] => binarytides.com
            [type] => A
            [ip] => 64.131.72.23
            [class] => IN
            [ttl] => 14202
        )

    [1] => Array
        (
            [host] => binarytides.com
            [type] => NS
            [target] => omikro2.allwebserver.com
            [class] => IN
            [ttl] => 86344
        )

    [2] => Array
        (
            [host] => binarytides.com
            [type] => NS
            [target] => omikro1.allwebserver.com
            [class] => IN
            [ttl] => 86344
        )

    [3] => Array
        (
            [host] => www.binarytides.com
            [type] => CNAME
            [target] => binarytides.com
            [class] => IN
            [ttl] => 13800
        )

    [4] => Array
        (
            [host] => binarytides.com
            [type] => SOA
            [mname] => host1.allwebserver.com
            [rname] => omikrosys.gmail.com
            [serial] => 2011020202
            [refresh] => 86400
            [retry] => 7200
            [expire] => 3600000
            [minimum-ttl] => 86400
            [class] => IN
            [ttl] => 86344
        )

    [5] => Array
        (
            [host] => binarytides.com
            [type] => MX
            [pri] => 0
            [target] => binarytides.com
            [class] => IN
            [ttl] => 14199
        )

)
php > 

Other options available are :
DNS_HINFO, DNS_PTR, DNS_SOA, DNS_TXT, DNS_AAAA, DNS_SRV, DNS_NAPTR, DNS_A6, DNS_ANY.

References :

1. Manual at : http://php.net/manual/en/function.dns-get-record.php

 
by Janeth Kent Date: 11-04-2013 hits : 2842  
 
Janeth Kent

Janeth Kent

Licenciada en Bellas Artes y programadora por pasión. Cuando tengo un rato retoco fotos, edito vídeos y diseño cosas. El resto del tiempo escribo en MA-NO WEB DESIGN END DEVELOPMENT.

 
 
 

We use our own and third-party cookies to improve our services, compile statistical information and analyze your browsing habits. This allows us to personalize the content we offer and to show you advertisements related to your preferences. By clicking "Accept all" you agree to the storage of cookies on your device to improve website navigation, analyse traffic and assist our marketing activities. You can also select "System Cookies Only" to accept only the cookies required for the website to function, or you can select the cookies you wish to activate by clicking on "settings".

Accept All Only sistem cookies Configuration