A quick and dirty PHP wrapper around the dig command for basic DNS inforamtion about a domain.

DnsLookup.php

<?php

class DnsLookup
{
    public static function dig($url)
    {
        $host            = $url;
        $digClassArray   = ['A', 'MX', 'NS', 'SOA', 'CNAME'];
        $finalOutput     = [];

        foreach ($digClassArray as $digClass) {
            $command = "dig $host $digClass +noall +answer";

            $results = shell_exec("$command");

            $results = explode(PHP_EOL, $results);
            $results = array_filter($results, function ($result) {
                return strpos($result, "\t") !== false;
            });

            foreach ($results as $answer) {
                $answer = explode("\t", $answer);

                $answer = array_filter($answer);
                $answer = array_values($answer);

                if (!array_key_exists(4, $answer)) {
                    if (strpos($answer[0], ' ')) {
                        $build = explode(' ', $answer[0]);
                        if (array_key_exists(3, $build) && $build[3] === 'A') {
                            array_push($build, $answer[1]);
                        }
                        if (array_key_exists(1, $answer) && $answer[1] === 'CNAME') {
                            $build = [
                                0 => $build[0],
                                1 => '',
                                2 => '',
                                3 => $answer[1],
                                4 => $answer[2],
                            ];
                        }
                        $answer = $build;
                    }
                }
                $answer = [
                    'Domain' => $answer[0],
                    'Type'   => $answer[3],
                    'Result' => $answer[4],
                ];
                $finalOutput[] = $answer;
            }
        }
        if (empty($finalOutput)) {
            throw new \Exception('Domain Name Error');
        }
        $finalOutput = array_map('unserialize', array_unique(array_map('serialize', $finalOutput)));

        $output = ['Results' => $finalOutput];

        return $output;
    }
}

echo '<pre style="background-color:white; "><code style="color:black;">';
var_dump(DnsLookup::dig('google.com'));
echo '</pre></code>';