Bulk DNS queries at blazing fast speed! (A/AAAA)

bulk_dns_query.php

<?php
// enter domain names in a file, newline delimited
$filename = 'domain_names.txt';

// read the file
$fp = @fopen($filename, 'r');
!$fp?die('File not found!'):'';
$domains = explode(PHP_EOL, fread($fp, filesize($filename)));
fclose($fp);

// Mapping for DNS record types
$typeMapping = [
    1 => 'A',     // Mapping for A record type
    28 => 'AAAA', // Mapping for AAAA record type
    // Add more mappings as needed for other record types
];

$dnsRecords = []; // Array to store DNS records
$mh = curl_multi_init(); // Initialize cURL multi-handler for concurrent requests
$ch = []; // Array to store individual cURL handles

// Loop through each domain to make A and AAAA DNS record requests
foreach ($domains as $domain) {
    // cURL handle for A record request
    $chA = curl_init();
    $optionsA = [
        CURLOPT_URL => "https://dns.google/resolve?name=$domain&type=A", // DNS query URL for A records
        CURLOPT_RETURNTRANSFER => true, // Return the transfer as a string
        CURLOPT_HTTP_VERSION => 31, // Set to 31 to require HTTP/3, 30 to allow fallback
    ];
    curl_setopt_array($chA, $optionsA);
    curl_multi_add_handle($mh, $chA);
    $ch[] = $chA;

    // cURL handle for AAAA record request
    $chAAAA = curl_init();
    $optionsAAAA = [
        CURLOPT_URL => "https://dns.google/resolve?name=$domain&type=AAAA", // DNS query URL for AAAA records
        CURLOPT_RETURNTRANSFER => true, // Return the transfer as a string
        CURLOPT_HTTP_VERSION => 31, // Set to 31 to require HTTP/3, 30 to allow fallback
    ];
    curl_setopt_array($chAAAA, $optionsAAAA);
    curl_multi_add_handle($mh, $chAAAA);
    $ch[] = $chAAAA;
}

// Execute the cURL multi-handler to perform concurrent requests
do {
    while (($info = curl_multi_info_read($mh)) !== false) {
        curl_multi_remove_handle($mh, $info['handle']);
    }
    curl_multi_exec($mh, $running);
} while ($running > 0);

// Process the responses for each domain
foreach ($ch as $index => $handle) {
    $response = curl_multi_getcontent($handle);
    $domain = $domains[(int)($index / 2)]; // Cast to int to avoid float to int conversion warning

    // Process $response as needed
    $decodedResponse = json_decode($response, true);

    // Check if the 'Answer' key exists in the response
    if (isset($decodedResponse['Answer'])) {
        $records = $decodedResponse['Answer'];
        $recordType = null;

        $recordType = $typeMapping[$records[0]['type']];

        // If neither A nor AAAA found, mark as 'Not Found'
        $recordType = $recordType ?? 'Not Found';

        // Store DNS records in the array
        $dnsRecords[$domain][$recordType] = array_column($records, 'data');
    } else {
        // If 'Answer' key is not found, mark as 'Record Not Found'
        $recordType = $typeMapping[$decodedResponse['Question'][0]['type']];
        $dnsRecords[$domain]["$recordType"] = ["# Record Not Found"];
    }
}

curl_multi_close($mh); // Close the cURL multi-handler

$detailed = $json = $yaml = 0;

if(isset($_GET['detailed']))
    $detailed = 1;

if(isset($_GET['json']))
    $json = 1;

if(isset($_GET['yaml']) && function_exists('yaml_emit'))
    $yaml = 1;

if($json){
    header('Content-Type: application/json');
    print json_encode($dnsRecords);
} elseif($yaml){
    header('Content-Type: text/yaml');
    print yaml_emit($dnsRecords);
} else {
    header('Content-Type: text/plain');
    // Output the DNS records in a human-readable format
    foreach ($dnsRecords as $domain => $records) {
        if($detailed)
            echo "# Domain: $domain".PHP_EOL;
        foreach ($records as $type => $values) {
            if($detailed)
                echo "# $type".PHP_EOL;
            foreach ($values as $value) {
                echo "$value".PHP_EOL;
            }
        }
        if($detailed)
            echo PHP_EOL;
    }
}
?>