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Example code of utopia-php/dns

Informations about the package dns

Utopia DNS

Build Status Total Downloads Discord

Utopia DNS is a simple and lite abstraction layer for quickly setting up a DNS server. This library is aiming to be as simple and easy to learn and use. This library is maintained by the Appwrite team.

Although this library is part of the Utopia Framework project it is dependency free, and can be used as standalone with any other PHP project or framework.

Getting started

Install using composer:

Using the DNS server

Init your DNS server with your preferred adapter and resolver. The adapter is used for running the UDP server to serve DNS requests, and the resolver will be used to answering DNS queries with proper results. You can and in most cases should implement your own resolver by extending src/DNS/Resolver.php

Using the DNS client

Utopia DNS also provides a simple, dependency‑free DNS client that can be used to perform queries against any DNS server. This client is ideal for applications that need to look up records on demand. It supports querying all sorts of DNS records (A, MX, TXT, AAAA, SRV, etc.).

Example Usage

Below is an example of how to use the DNS client:

How it works

Instantiate the client

Create a new instance of the Client class and specify the DNS server you wish to query. In the example above, we use Google's DNS server (8.8.8.8).

Perform a query

Use the query() method with the desired domain and record type (for example, 'A' for an IPv4 address) to retrieve DNS records.

The client returns an array of Record objects. These objects contain the queried domain name, type (both numeric and human‑readable), TTL, and record data. Optional fields (such as priority, weight, and port for MX and SRV records) are available via their getters.

Error handling

The query is wrapped in a try‑catch block to handle any exceptions that may occur during the DNS lookup.

Supported DNS records

Adapters

Below is a list of supported server adapters, and their compatibly tested versions alongside a list of supported features and relevant limits.

Adapter Status Info Version
Native ✅ A native PHP Socket 8.0
Swoole ✅ PHP Swoole UDP Server 4.8.4
Workerman 🛠 - -
ReactPHP 🛠 - -

✅ - supported, 🛠 - work in progress

Future possibilities

Currently this library only support DNS over UDP. We could add support for both DNS over TLS and HTTPS. We should also add better support for query flags, and possibly create some more predefined resolvers.

System requirements

Utopia Framework requires PHP 8.0 or later. We recommend using the latest PHP version whenever possible.

Running tests

Run tests for this library using the provided Docker container.

Benchmarking

The library includes a benchmarking tool to measure DNS server performance under load. The benchmark tests various record types and provides detailed performance metrics.

Running the benchmark

Options

Metrics Provided

Example Output

All versions of dns with dependencies

PHP Build Version
Package Version
Requires php Version >=8.0
utopia-php/cli Version 0.15.*
Composer command for our command line client (download client) This client runs in each environment. You don't need a specific PHP version etc. The first 20 API calls are free. Standard composer command

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