*/ protected $parts = []; /** * @param string|null $sort * @param string|null $order */ public function __construct($sort = null, $order = null) { if ($sort) { $this->add($sort, $order); } } /** * @param string $sort * @param string|null $order * * @return void */ public function add($sort, $order = null) { $order = ! $order ? 'ASC' : $order; $this->parts[] = $sort . ' ' . $order; } /** * @return int * @psalm-return 0|positive-int */ public function count() { return count($this->parts); } /** * @psalm-return list */ public function getParts() { return $this->parts; } /** * @return string */ public function __toString() { return $this->preSeparator . implode($this->separator, $this->parts) . $this->postSeparator; } }