ParagonIE_Sodium_Core_Util::hashEquals( string $left, string $right ): bool

286    public static function hashEquals($left, $right)287    {288        /* Type checks: */289        if (!is_string($left)) {290            throw new TypeError('Argument 1 must be a string, ' . gettype($left) . ' given.');291        }292        if (!is_string($right)) {293            throw new TypeError('Argument 2 must be a string, ' . gettype($right) . ' given.');294        }295 296        if (is_callable('hash_equals')) {297            return hash_equals($left, $right);298        }299        $d = 0;300        /** @var int $len */301        $len = self::strlen($left);302        if ($len !== self::strlen($right)) {303            return false;304        }305        for ($i = 0; $i < $len; ++$i) {306            $d |= self::chrToInt($left[$i]) ^ self::chrToInt($right[$i]);307        }308 309        if ($d !== 0) {310            return false;311        }312        return $left === $right;313    }