Verifying a Domain

[cliffordpg]

Hi All,
I have seen similar solutions but modifying the code to fit my site is proving to be a problem. I would like to verify the domain of a user exists before he/she submits a form. I have created the function in a class file and call this class. However, the logic is rejecting all domains regardless of whether they exist or not.

my function code is as follows from my auth_class.php file.

function myCheckDNSRR($hostName, $recType = '')
{
    if(!empty($hostName)) {
        if( $recType == '' ) $recType = "MX";
        exec("nslookup -type=$recType $hostName", $result);
        // check each line to find the one that starts with the host
        // name. If it exists then the function succeeded.
        foreach ($result as $line) {
            if(eregi("^$hostName",$line)) {
                return true;
                $this->domchk = 1;
            }
        }
        return false;
        $this->domchk = 0;
    }
    return false;
    $this->domchk = 0;
}

}

The code from the form page is as follows:

                    $auth = new authorise;
                    $auth->myCheckDNSRR($form['email']);
                    if ($auth->domchk == 0) {
                        $output->msg .= "Invalid domain. Please check and try again.<br />";
                        $mark['email']= 1;
                    }

I can't figure out what I'm doing wrong with the logic and I just need to be pointed in the right direction. Thanks all.

[anoopmail]

whats the result if you exceute the same command on the servers console?

[cliffordpg]

the code works. I think the problem is capturing and splitting the email address itself because I'm getting the address from $form['email']. I don't think I'm splitting it correctly.

[cliffordpg]

I meant the code works on the server console.

[Res]

I'm seeing the same thing you suspect is the problem. You have a function that sees if a domain name exists, but you are passing it an email address. I'm not seeing a section of code that extracts the host name from the email. I'm fairly certain nslookup doesn't work with emails.

As you said, it works from command line, so you should just need to strip the host name out and pass that rather then the full email.

Not the best method, but works to some extent...

//[e-mail]
$email_parts = explode('@', $email);
//turns into
//[0] => test
//[1] => user.com
$email_host = $email_parts[1];