Email Validator

Standalone PHP email validation and sanitization functions. RFC 5321 compliant.

Installation

composer require arraypress/email-validator

Usage

Validation

if ( is_valid_email( 'user@example.com' ) ) {
    // Valid email
}

Sanitization

$clean = sanitize_email( '  USER@EXAMPLE.COM  ' );
// Returns: 'user@example.com'

$clean = sanitize_email( 'test@domain..com' );
// Returns: 'test@domain.com'

$clean = sanitize_email( 'invalid' );
// Returns: '' (empty string)

Validation Rules

• Length: 6-254 characters
• Single @ symbol after first position
• No whitespace or control characters
• Local part: max 64 characters, valid characters only, no leading/trailing/consecutive dots
• Domain: at least two parts, no consecutive dots, no leading/trailing hyphens
• TLD: minimum 2 characters, alphabetic only

Sanitization Behavior

• Trims whitespace
• Converts to lowercase
• Strips invalid characters from local part
• Normalizes consecutive dots in domain
• Removes leading/trailing dots and hyphens from domain parts
• Returns empty string if email cannot be sanitized to valid format

Requirements

• PHP 8.0+

License

GPL-2.0-or-later