- What does markrogoyski/ipv4-subnet-calculator actually do?
- It is a pure PHP calculation library that takes an IPv4 address with a CIDR prefix, such as 192.168.112.203/23, and returns derived subnet data: the subnet mask, network portion, broadcast address, minimum and maximum host, and the address and host counts. It is a stateless value calculator, not an IPAM system, so it does not store anything, detect overlapping subnets, or allocate address space. There is no framework coupling, which makes it a safe leaf-node dependency in a Laravel application.
- How do I install markrogoyski/ipv4-subnet-calculator in a Laravel project?
- Install it with Composer: composer require markrogoyski/ipv4-subnet-calculator. There are no migrations, publishable assets, environment variables, queue workers, or cache requirements to configure. Composer resolves the PHP constraint against your project, so any conflicts surface immediately at install time. You can verify basic behaviour in a Tinker session within minutes of installing.
- Do I need to register a service provider or facade for this package in Laravel?
- No. The package ships no service provider, no config file, and no facade because it is framework-agnostic PHP rather than a Laravel package. Laravel's package discovery has nothing to register, so installation is complete after Composer finishes. If you want container resolution, bind the calculator as a singleton yourself, since it is stateless and cheap to reuse.
- Which Laravel and PHP versions does markrogoyski/ipv4-subnet-calculator support?
- The library is not tied to any Laravel major, so compatibility depends almost entirely on its PHP version constraint resolving against your minimum supported PHP. Check the installed release's composer.json against your platform before assuming support, especially if you run an older PHP runtime. Because there is no Laravel integration code, there is no framework version matrix to worry about beyond that constraint.
- Does markrogoyski/ipv4-subnet-calculator support IPv6 subnetting?
- No, it is IPv4-only, with no dual-stack or IPv6 handling. If your roadmap includes IPv6 subnetting, this package is only a partial solution and you will need a second dependency or in-house code for the v6 side. Decide early whether IPv6 is in scope, because it changes whether you treat this as your single network calculator.
- How does the calculator handle edge cases like /31, /32, and /0 prefixes?
- Point-to-point and single-host prefixes (/31 per RFC 3021, /32) and the full-range /0 case are the classic boundary conditions for any IPv4 calculator, and their host-count semantics are easy to get subtly wrong. Do not assume behaviour: run those prefixes against the exact version you install and pin the outputs in your own tests. A contract test suite with fixtures such as /24, /30, /31, /32, /0, and 10.0.0.0/8 protects you from a silent change in an upstream minor release.
- Can host or address counts overflow PHP integers for large prefixes?
- Address counts for very large prefixes, such as /0 or /1, can exceed the range of a 32-bit signed integer, which matters if you deploy on 32-bit PHP. Confirm the library's return types and numeric formatting on your actual target platform rather than on a 64-bit dev machine. If you expose these values through an API, consider casting to string in your DTO so consumers receive consistent, lossless output.
- Does the package validate user-supplied IP addresses and CIDR strings?
- No, it assumes a well-formed IPv4 address and an in-range prefix, so upstream validation is your responsibility. Validate every user-supplied CIDR string with a Laravel validation rule or a custom rule before it crosses into the calculator. This keeps malformed input from reaching library internals and gives you cleaner, framework-native error messages.
- What is the best way to use markrogoyski/ipv4-subnet-calculator inside a Laravel application?
- Wrap it in an application-layer service, for example a SubnetCalculatorService behind an interface you own, and return a DTO rather than leaking the library's associative array into your domain. Keep it out of controllers so it can be called from jobs, form requests, Artisan commands, and other services without duplication. Defining your interface around concepts such as network, broadcast, host range, and counts makes swapping to an IPv6-capable or in-house implementation a one-file change.
- Is a single-maintainer package like this safe to depend on, and what are the alternatives?
- Technically the risk is low because the library is essentially commodity arithmetic defined by RFC 4632 and RFC 3021, and it is MIT licensed, so forking and vendoring is always available. The sustainability signal is thin, however: modest star count, no dependent packages, and effectively one maintainer, meaning no ecosystem validation or vendor escalation path. Pin your expected outputs with contract tests and keep your own wrapper interface so replacing it with an IPv6-capable alternative or in-house code remains roughly a day of work.