when I use composer to install laravel I'm getting error

PHP Fatal error:

Cannot use 'PhpParser\Node\Scalar\String' as class name as it is reserved in /opt/lampp/htdocs/makemykareer/vendor/nikic/php-parser/lib/PhpParser/PrettyPrinter/Standard.php on line 86

I'm using php 7 and ubuntu 16.04

via yogesh gore