Punic\Comparer::compare PHP Метод

    public function compare($a, $b)
    {
        $result = null;
        if (isset($this->collator)) {
            try {
                $a = (string) $a;
                $b = (string) $b;
                if ($this->caseSensitive) {
                    $result = $this->collator->compare($a, $b);
                } else {
                    $array = array($a, $b);
                    if ($this->sort($array) === false) {
                        $result = false;
                    } else {
                        $ia = array_search($a, $array);
                        if ($ia === 1) {
                            $result = 1;
                        } else {
                            $ib = array_search($b, $array);
                            if ($ib === 1) {
                                $result = -1;
                            } else {
                                $result = 0;
                            }
                        }
                    }
                }
            } catch (PHPException $x) {
            }
        }
        if ($result === null) {
            $a = $this->normalize($a);
            $b = $this->normalize($b);
            $result = $this->caseSensitive ? strnatcmp($a, $b) : strnatcasecmp($a, $b);
        }
        return $result;
    }