README

Simple library to check an IP address against a domain's SPF record

Requirements

This library requires a supported version of PHP, that is PHP >= 8.1.

Older versions of this library support older versions of PHP. Please note that no bugfixes, no new features, and no support will be provided for older versions.

Installation

This library is available through Composer. Run composer require "mika56/spfcheck:^3.0" or add this to your composer.json:

{
  "require": {
    "mika56/spfcheck": "^3.0"
  }
}

Usage

Create a new instance of SPFCheck. The constructor requires a DNSRecordGetterInterface to be passed. Included in this library is DNSRecordGetter, which uses PHP's DNS function dns_get_record to get data. Please take a look at mika56/spfcheck-dns-direct if you want to use custom DNS servers.

<?php
use Mika56\SPFCheck\DNS\DNSRecordGetter;
use Mika56\SPFCheck\SPFCheck;

require('vendor/autoload.php');

$checker = new SPFCheck(new DNSRecordGetter());
var_dump($checker->getIPStringResult('127.0.0.1', 'test.com'));

Return value is one of Result::SHORT_PASS, Result::SHORT_FAIL, Result::SHORT_SOFTFAIL, Result::SHORT_NEUTRAL, Result::SHORT_NONE, Result::SHORT_PERMERROR, Result::SHORT_TEMPERROR

If you want to get more details about the check, you can use SPFCheck::getResult(Query $query): Result which will return a Result object with more details about the check.