CODEWITHSUNDEEP
phpdns
JochemQuery
JochemQuery

Reputation: 1567

PHP domain name verify

This is an another topic about domain name verify. I read answers in other topics. I tried several scripts. I don't want to use an API. Unless there is a free API but I not yet found one.

I tried to check the DNS following code:

if($_POST['submit']){

    if(!empty($_POST['check_site'])){
        $url = $_POST['check_site'];

        //add .nl
        if(!strpos($url,'.nl')){
            $url.= '.nl';
        }

        //check dns record
        $result  = dns_get_record($url);

        if(count($result) > 0)
        {
            echo $url. ' is used';
        }else{
            echo $url. ' is free';
        }
    }
}

The problem is when I try to check "example.nl" (A registred but inactive domain) it don't give DNS data back so I validate is as free domain.

My questions are:

  1. Does anyone a fix?

  2. Does anyone have a suggestion (link to other script/article)

  3. Is there a way to check if a site have a registrar.

I'm still a student but this is not a school project.

Live code on : link

I am checking the answers, thanks in advance

Edit:

When I try to 

   shell_exec (whois -h whois.domain-registry.nl 'is example.nl');

I get a unexpected T_String error. What is the correct way to use this?

Upvotes: 1

Views: 970

Answers (2)

Vishnu R
Vishnu R

Reputation: 1879

I think PHP functions checks if site is assigned to an IP address or not. That is why inactive domains are identified as free!

Anyway you can check your code again with checkdnsrr() of PHP.

If it does not works, there is an extension for this purpose. I think it is free.

Upvotes: 1

Ronald Paul
Ronald Paul

Reputation: 421

If your PHP installation has rights to execute the whois command line utility commonly found on UNIX-based server, you could get your information from the following command:

whois -h whois.domain-registry.nl 'is example.nl'

This command is taken from this SIDN page, under 'Is'. You must check whether you can do this more than 15 times a day from one IP address, because you also can't do that for the more complete whois (without 'is'). You also seem to be restricted to one request per second.

Upvotes: 4

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