What potential issues or limitations are there when using PHP to query DNS records?

One potential issue when using PHP to query DNS records is that the DNS functions in PHP are limited and may not provide all the information needed. To solve this, you can use external libraries or tools like `dns_get_record` or `Net_DNS2` to perform more advanced DNS queries. 

// Using dns_get_record to query DNS records
$domain = 'example.com';
$records = dns_get_record($domain, DNS_ALL);
print_r($records);

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PHP DNS records limitations query potential issues

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