HarunGecit/php-email-validator

A comprehensive PHP email validation library for checking email format, detecting disposable email addresses, validating MX records, and batch email processing.

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Features

• Format Validation: Validates email addresses against RFC standards using PHP's built-in filters
• Disposable Email Detection: Identifies temporary/disposable email addresses using an extensive blocklist (4,900+ domains)
• MX Record Validation: Verifies the existence of mail servers for email domains
• Batch Validation: Validate multiple emails at once with detailed results
• Statistics: Get validation statistics for email lists
• Filtering: Filter valid/invalid emails from arrays
• Customizable Lists: Add/remove domains from blocklist and allowlist dynamically
• Caching: Built-in caching for improved performance
• Lightweight: All dependencies and blocklists included for offline use
• Cross-Platform: Works on Linux, Windows, and macOS

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Installation

Install the package via Composer:

composer require harungecit/php-email-validator

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Compatibility

This package is compatible with the following PHP versions:

• PHP 7.4
• PHP 8.0
• PHP 8.1
• PHP 8.2
• PHP 8.3
• PHP 8.4
• PHP 8.5

Tested on Ubuntu, Windows, and macOS platforms.

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Quick Start

use HarunGecit\EmailValidator\EmailValidator;

// Create validator with default lists
$validator = EmailValidator::create();

// Validate a single email
if ($validator->isValid('user@example.com')) {
    echo "Email is valid!";
}

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Usage

Basic Example

use HarunGecit\EmailValidator\EmailValidator;
use HarunGecit\EmailValidator\Fetcher;

// Load blocklist and allowlist from the package
$blocklist = Fetcher::loadBlocklist();
$allowlist = Fetcher::loadAllowlist();

// Initialize the validator
$validator = new EmailValidator($blocklist, $allowlist);

$email = "example@10minutemail.com";

// Perform validations
if (!$validator->isValidFormat($email)) {
    echo "Invalid email format.";
} elseif ($validator->isDisposable($email)) {
    echo "Disposable email detected.";
} elseif (!$validator->hasValidMX($email)) {
    echo "Invalid MX record.";
} else {
    echo "Email is valid.";
}

Complete Validation (One-liner)

$validator = EmailValidator::create();

// Validates format, checks blocklist, and verifies MX records
if ($validator->isValid('user@example.com')) {
    echo "Email passed all checks!";
}

// Skip MX check for faster validation
if ($validator->isValid('user@example.com', false)) {
    echo "Email passed format and blocklist checks!";
}

Detailed Validation Results

$result = $validator->validateWithDetails('user@mailinator.com');

// Result structure:
// [
//     'valid' => false,
//     'format' => true,
//     'disposable' => true,
//     'mx' => null,
//     'domain' => 'mailinator.com',
//     'errors' => ['Disposable email address']
// ]

if (!$result['valid']) {
    foreach ($result['errors'] as $error) {
        echo "Error: $error\n";
    }
}

Batch Validation

$emails = [
    'user1@gmail.com',
    'user2@mailinator.com',
    'invalid-email',
    'user3@example.com',
];

// Validate all emails at once
$results = $validator->validateMultiple($emails, false);

foreach ($results as $email => $result) {
    $status = $result['valid'] ? 'VALID' : 'INVALID';
    echo "$email: $status\n";
}

Filter Valid/Invalid Emails

$emails = ['valid@gmail.com', 'bad@tempmail.com', 'invalid', 'ok@example.com'];

// Get only valid emails
$validEmails = $validator->filterValid($emails, false);
// Result: ['valid@gmail.com', 'ok@example.com']

// Get only invalid emails
$invalidEmails = $validator->filterInvalid($emails, false);
// Result: ['bad@tempmail.com', 'invalid']

Get Validation Statistics

$emails = ['a@gmail.com', 'b@tempmail.com', 'invalid', 'c@example.com'];

$stats = $validator->getStatistics($emails, false);

// Result:
// [
//     'total' => 4,
//     'valid' => 2,
//     'invalid' => 2,
//     'disposable' => 1,
//     'invalid_format' => 1,
//     'no_mx' => 0
// ]

Custom Blocklist/Allowlist

$validator = new EmailValidator([], []);

// Add domains to blocklist
$validator->addToBlocklist('custom-disposable.com');
$validator->addMultipleToBlocklist(['temp1.com', 'temp2.com']);

// Add domains to allowlist (takes priority over blocklist)
$validator->addToAllowlist('allowed-domain.com');

// Remove domains
$validator->removeFromBlocklist('temp1.com');
$validator->removeFromAllowlist('allowed-domain.com');

// Get lists
$blocklist = $validator->getBlocklist();
$allowlist = $validator->getAllowlist();

// Get counts
echo "Blocklist: " . $validator->getBlocklistCount() . " domains\n";
echo "Allowlist: " . $validator->getAllowlistCount() . " domains\n";

Email Normalization

// Normalize single email (lowercase, trim)
$normalized = $validator->normalize('  USER@EXAMPLE.COM  ');
// Result: 'user@example.com'

// Normalize multiple emails
$normalized = $validator->normalizeMultiple(['USER@A.COM', 'Test@B.Com']);
// Result: ['user@a.com', 'test@b.com']

Extract Email Parts

$email = 'user.name+tag@sub.example.com';

$domain = $validator->extractDomain($email);
// Result: 'sub.example.com'

$localPart = $validator->extractLocalPart($email);
// Result: 'user.name+tag'

Using Fetcher Utilities

use HarunGecit\EmailValidator\Fetcher;

// Load both lists at once
$lists = Fetcher::loadAll();
$blocklist = $lists['blocklist'];
$allowlist = $lists['allowlist'];

// Load custom lists
$customBlocklist = Fetcher::loadCustomBlocklist('/path/to/custom.conf');

// Merge multiple lists
$merged = Fetcher::mergeLists(['/path/to/list1.conf', '/path/to/list2.conf']);

// Save a list
Fetcher::saveList('/path/to/output.conf', ['domain1.com', 'domain2.com']);

// Check file existence
if (Fetcher::blocklistExists()) {
    echo "Blocklist has " . Fetcher::getBlocklistCount() . " domains\n";
}

// Clear cache (useful for testing or reloading)
Fetcher::clearCache();

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How It Works

1. Email Format Validation:

   • Uses PHP's filter_var function with FILTER_VALIDATE_EMAIL
   • Example: test@example.com is valid, test@com is not

2. Disposable Email Detection:

   • Checks the domain against a blocklist of 4,900+ known disposable providers
   • Allowlist takes priority (domains in allowlist are never marked as disposable)
   • Example: user@mailinator.com is marked as disposable

3. MX Record Validation:

   • Uses checkdnsrr function to verify mail server existence
   • Results are cached for performance
   • Example: example.com with a valid mail server passes validation

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Blocklist and Allowlist

The package comes with preloaded blocklist and allowlist files located in the data/ directory.

• Blocklist (blocklist.conf): Contains 4,900+ domains of known disposable email providers
• Allowlist (allowlist.conf): Contains 180+ domains that should always be considered valid

File Format

One domain per line, lowercase:

mailinator.com
guerrillamail.com
tempmail.com

You can customize these files or load custom lists using the Fetcher class.

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API Reference

EmailValidator Class

Method	Description
create(): self	Static factory method with default lists
isValidFormat(string $email): bool	Validate email format
isDisposable(string $email): bool	Check if email is disposable
hasValidMX(string $email): bool	Check MX records
hasValidDNS(string $email): bool	Check A/AAAA records
isValid(string $email, bool $checkMX = true): bool	Complete validation
validateMultiple(array $emails, bool $checkMX = true): array	Batch validation
validateWithDetails(string $email, bool $checkMX = true): array	Detailed results
filterValid(array $emails, bool $checkMX = true): array	Filter valid emails
filterInvalid(array $emails, bool $checkMX = true): array	Filter invalid emails
getStatistics(array $emails, bool $checkMX = true): array	Get statistics
extractDomain(string $email): ?string	Extract domain
extractLocalPart(string $email): ?string	Extract local part
normalize(string $email): string	Normalize email
normalizeMultiple(array $emails): array	Normalize multiple
isAllowlisted(string $email): bool	Check if in allowlist
isBlocklisted(string $email): bool	Check if in blocklist
addToBlocklist(string $domain): self	Add to blocklist
addMultipleToBlocklist(array $domains): self	Add multiple to blocklist
addToAllowlist(string $domain): self	Add to allowlist
addMultipleToAllowlist(array $domains): self	Add multiple to allowlist
removeFromBlocklist(string $domain): self	Remove from blocklist
removeFromAllowlist(string $domain): self	Remove from allowlist
getBlocklist(): array	Get blocklist
getAllowlist(): array	Get allowlist
getBlocklistCount(): int	Get blocklist count
getAllowlistCount(): int	Get allowlist count
setCacheEnabled(bool $enabled): self	Enable/disable MX caching
clearCache(): self	Clear MX cache

Fetcher Class

Method	Description
loadBlocklist(bool $useCache = true): array	Load blocklist
loadAllowlist(bool $useCache = true): array	Load allowlist
loadAll(bool $useCache = true): array	Load both lists
loadCustomBlocklist(string $path): array	Load custom blocklist
loadCustomAllowlist(string $path): array	Load custom allowlist
mergeLists(array $paths): array	Merge multiple lists
saveList(string $path, array $domains): bool	Save list to file
clearCache(): void	Clear loaded cache
getBlocklistPath(): string	Get blocklist path
getAllowlistPath(): string	Get allowlist path
blocklistExists(): bool	Check blocklist exists
allowlistExists(): bool	Check allowlist exists
getBlocklistCount(): int	Get blocklist count
getAllowlistCount(): int	Get allowlist count

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Testing

Run the test suite:

composer test

Run with coverage:

composer test-coverage

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Upgrading from v1.x

If you're upgrading from v1.x, note these breaking changes:

1. Namespace Change:

   // Old (v1.x)
   use PHPOrbit\EmailValidator\EmailValidator;
   
   // New (v2.x)
   use HarunGecit\EmailValidator\EmailValidator;

2. Package Name Change:

   # Old
   composer require phporbit/php-email-validator
   
   # New
   composer require harungecit/php-email-validator

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Contributing

Contributions are welcome! To contribute:

1. Fork the repository
2. Create a feature branch
3. Make your changes
4. Add tests for new functionality
5. Ensure all tests pass
6. Submit a pull request

Please ensure that all new code:

• Has comprehensive tests
• Follows PSR-12 coding standards
• Includes PHPDoc comments

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License

This project is licensed under the MIT License. See the LICENSE file for details.

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Author

Harun Geçit

• GitHub
• LinkedIn
• Email

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Changelog

v2.0.0

• Breaking: Namespace changed from PHPOrbit\EmailValidator to HarunGecit\EmailValidator
• Breaking: Package name changed from phporbit/php-email-validator to harungecit/php-email-validator
• Added batch email validation (validateMultiple, filterValid, filterInvalid)
• Added isValid() method for complete validation
• Added validateWithDetails() for detailed results
• Added getStatistics() for validation statistics
• Added static factory method EmailValidator::create()
• Added fluent interface for list management
• Added MX record caching with setCacheEnabled() and clearCache()
• Added hasValidDNS() for A/AAAA record checking
• Added email normalization methods
• Added isAllowlisted() and isBlocklisted() methods
• Enhanced Fetcher with caching, custom list loading, and merge capabilities
• Expanded test suite with comprehensive coverage
• Added multi-platform CI support (Ubuntu, Windows, macOS)
• Added PHP 8.5 support

v1.0.2

• Updated blocklist and allowlist files
• Improved code quality and documentation

v1.0.1

• Bug fixes and improvements

v1.0.0

• Initial release with support for:
  • Email format validation
  • Disposable email detection
  • MX record validation