错误
Your requirements could not be resolved to an installable set of packages.
原因
php不匹配composer.json要求的版本
解决方法
composer install –ignore-platform-reqs
composer update –ignore-platform-reqs
composer create-project –prefer-dist laravel/laravel blog “5.5.*”
其他情况
未满足一下条件
- PHP >= 7.0.0
- PHP OpenSSL 扩展
- PHP PDO 扩展
- PHP Mbstring 扩展
- PHP Tokenizer扩展
- PHP XML 扩展