LdapTools\Query\LdapResultSorter::getComparisonValue PHP Метод

    protected function getComparisonValue($entry, $attribute)
    {
        $alias = null;
        if (!empty($this->aliases)) {
            list($alias, $attribute) = LdapUtilities::getAliasAndAttribute($attribute);
        }
        $value = '';
        if (is_array($entry) && isset($entry[$attribute])) {
            $value = $entry[$attribute];
            // Be forgiving if they are hydrating to an array and the case of the attribute was not correct.
        } elseif (is_array($entry) && array_key_exists(MBString::strtolower($attribute), MBString::array_change_key_case($entry))) {
            $value = MBString::array_change_key_case($entry)[MBString::strtolower($attribute)];
            // Only get the value if there is no alias requested, or if an alias was requested the object type must match the alias.
        } elseif ($entry instanceof LdapObject && (!$alias || $entry->isType($this->aliases[$alias]->getObjectType())) && $entry->has($attribute)) {
            $value = $entry->get($attribute);
        }
        // How to handle multi-valued attributes? This will at least prevent errors, but may not be accurate.
        $value = is_array($value) ? reset($value) : $value;
        return $this->convertValueToString($value);
    }