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<?php
declare(strict_types=1);
namespace Budgegeria\IntlSort;
use Collator as IntlCollector;
use function assert;
use function is_int;
class Collator extends IntlCollector
{
public const NULL_VALUES_FIRST = 1;
public const NULL_VALUES_LAST = 2;
/** @var int|null */
private $nullableSort;
public function setNullableSort(?int $value): void
$this->nullableSort = $value;
}
/**
* @param mixed $value
* @param mixed $comparativeValue
*/
public function compare($value, $comparativeValue): int
if ($this->nullableSort === self::NULL_VALUES_LAST && ($comparativeValue === null || $value === null)) {
return $comparativeValue <=> $value;
if ($this->nullableSort === self::NULL_VALUES_FIRST && ($comparativeValue === null || $value === null)) {
return 1;
$result = parent::compare((string) $value, (string) $comparativeValue);
assert(is_int($result));
return $result;
SenseException /
intl-sort
