ParagonIE_Sodium_Core_Util::load64_le( string $string ): int

495    public static function load64_le($string)496    {497        /* Type checks: */498        if (!is_string($string)) {499            throw new TypeError('Argument 1 must be a string, ' . gettype($string) . ' given.');500        }501 502        /* Input validation: */503        if (self::strlen($string) < 4) {504            throw new RangeException(505                'String must be 4 bytes or more; ' . self::strlen($string) . ' given.'506            );507        }508        if (PHP_VERSION_ID >= 50603 && PHP_INT_SIZE === 8) {509            /** @var array<int, int> $unpacked */510            $unpacked = unpack('P', $string);511            return (int) $unpacked[1];512        }513 514        /** @var int $result */515        $result  = (self::chrToInt($string[0]) & 0xff);516        $result |= (self::chrToInt($string[1]) & 0xff) <<  8;517        $result |= (self::chrToInt($string[2]) & 0xff) << 16;518        $result |= (self::chrToInt($string[3]) & 0xff) << 24;519        $result |= (self::chrToInt($string[4]) & 0xff) << 32;520        $result |= (self::chrToInt($string[5]) & 0xff) << 40;521        $result |= (self::chrToInt($string[6]) & 0xff) << 48;522        $result |= (self::chrToInt($string[7]) & 0xff) << 56;523        return (int) $result;524    }