wikimedia/mediawiki-core

<?php

namespace MediaWiki\User\Registration;

use MediaWiki\User\UserIdentity;

/**
 * @since 1.41
 * @stable to implement
 */
interface IUserRegistrationProvider {

    /**
     * Get user registration timestamp
     *
     * @param UserIdentity $user
     * @return string|false|null Registration timestamp, null if not available or false if it
     * cannot be fetched (anonymous users, for example).
     */
    public function fetchRegistration( UserIdentity $user );
}