README

A library for validating emails against several RFC.

Supported RFCs

This library aims to support RFCs:

• 5321,
• 5322,
• 6530,
• 6531,
• 6532,
• 1035

Supported versions

Requirements

• PHP 8.1
• Composer is required for installation
• Spoofchecking and DNSCheckValidation validation requires that your PHP system has the PHP Internationalization Libraries (also known as PHP Intl)

Note: PHP version upgrades will happen to accomodate to the pace of major frameworks. Minor versions bumps will go via minor versions of this library (i.e: PHP7.3 -> v3.x+1). Major versions will go with major versions of the library

Installation

Run the command below to install via Composer

composer require egulias/email-validator

Getting Started

EmailValidator requires you to decide which (or combination of them) validation/s strategy/ies you'd like to follow for each validation.

A basic example with the RFC validation

<?php

use Egulias\EmailValidator\EmailValidator;
use Egulias\EmailValidator\Validation\RFCValidation;

$validator = new EmailValidator();
$validator->isValid("example@example.com", new RFCValidation()); //true

Available validations

1. RFCValidation: Standard RFC-like email validation.
2. NoRFCWarningsValidation: RFC-like validation that will fail when warnings* are found.
3. DNSCheckValidation: Will check if there are DNS records that signal that the server accepts emails. This does not entail that the email exists.
4. MultipleValidationWithAnd: It is a validation that operates over other validations performing a logical and (&&) over the result of each validation.
5. MessageIDValidation: Follows RFC2822 for message-id to validate that field, that has some differences in the domain part.
6. Your own validation: You can extend the library behaviour by implementing your own validations.

*warnings: Warnings are deviations from the RFC that in a broader interpretation are accepted.

<?php

use Egulias\EmailValidator\EmailValidator;
use Egulias\EmailValidator\Validation\DNSCheckValidation;
use Egulias\EmailValidator\Validation\MultipleValidationWithAnd;
use Egulias\EmailValidator\Validation\RFCValidation;

$validator = new EmailValidator();
$multipleValidations = new MultipleValidationWithAnd([
    new RFCValidation(),
    new DNSCheckValidation()
]);
//ietf.org has MX records signaling a server with email capabilities
$validator->isValid("example@ietf.org", $multipleValidations); //true

Additional validations

Validations not present in the RFCs

1. SpoofCheckValidation: Will check for multi-utf-8 chars that can signal an erroneous email name.

How to extend

It's easy! You just need to implement EmailValidation and you can use your own validation.

Contributing

Please follow the Contribution guide. Is short and simple and will help a lot.

Other Contributors

(You can find current contributors here)

As this is a port from another library and work, here are other people related to the previous one:

• Ricard Clau @ricardclau: Performance against PHP built-in filter_var (v2 and earlier)
• Josepf Bielawski @stloyd: For its first re-work of Dominic's lib
• Dominic Sayers @dominicsayers: The original isemail function

License

Released under the MIT License attached with this code.