Multiple Emails for Alerts (Code Within)

Hey there Edir,

I am looking to send out Vulnerability Reports to multiple people through your plugin. I noticed that it is not able to handle that in its current state.

Right now if you try and add multiple emails, the validation method using is_email() validates as false, as [email protected],[email protected] will validate as an incorrect email.

I modified the validation method to support handling multiple email addresses. Is this something that could be addressed? Or is there a way I could create assist on the plugin and create a Pull Request for the change?

Here are the changes I made:

Modified in vulnerability-alerts.php

/*
* Validating fields
*/
static public function validate($input) {
	if ( ! empty( $input['email'] ) ) {
		// Remove any whitespace
		$input['email'] = preg_replace('/\s/', '', $input['email']);

		// Check for multiple emails, separated by the comma (,)
		$emails = explode( ',', $input['email'] );

		// Loop through the emails and ensure they are all valid
		foreach ( $emails as $email ) {
			if ( ! is_email( $email ) ) {
				add_settings_error( self::$id . '_notification', 'invalid-email', __( 'You have entered an invalid e-mail address.', self::$id ) );
			}
		}

	}

	return $input;
}

I also added a line to the introduction explaining how to add multiple e-mails for notifications.

/*
* Introduction
*/
static public function introduction() {

	echo '<p>' . __('Fill the options below if you want to be notified by mail about new vulnerabilities. To add multiple e-mail addresses, separate them via comma (,).', self::$id) . '</p>';

}