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Edit File: EmailFormatRule.php

<?php namespace WPDesk\FCF\Free\Validator\Rule; use WPDesk\FCF\Free\Validator\Error\InvalidEmailError; /** * Checks that the e-mail value is valid. */ class EmailFormatRule implements ValidatorRule { /** * {@inheritdoc} */ public function validate_value( string $value, array $field_data ) { if ( ( $value === '' ) || filter_var( $value, FILTER_VALIDATE_EMAIL ) ) { return null; } return new InvalidEmailError( $field_data, $value ); } }