当我想composer install在我的项目上运行时出现错误。错误发出如下：
arief@arief-X45C:~/Triplogic/tripologic-admin-laravel$ sudo composer install
Loading composer repositories with package information
Installing dependencies (including require-dev) from lock file
Your requirements could not be resolved to an installable set of packages.
Problem 1
- Installation request for symfony/event-dispatcher v4.0.1 -> satisfiable by symfony/event-dispatcher[v4.0.1].
- symfony/event-dispatcher v4.0.1 requires php ^7.1.3 -> your PHP version (7.0.22) does not satisfy that requirement.
Problem 2
- Installation request for doctrine/instantiator 1.1.0 -> satisfiable by doctrine/instantiator[1.1.0].
- doctrine/instantiator 1.1.0 requires php ^7.1 -> …