When installing an open source project, the author used PHP 7.1 locally for development, and I used PHP 7.0 locally, so a tragedy happened, and this error occurred: requires php ^7.1 -> your PHP version (7.0.13) does not satisfy that requirement..
composer install error after
vagrant@homestead:~/Code/sample$ 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 doctrine/instantiator 1.1.0 -> satisfiable by doctrine/instantiator[1.1.0]. - doctrine/instantiator 1.1.0 requires php ^7.1 -> your PHP version (7.0.13) does not satisfy that requirement. Problem 2 - doctrine/instantiator 1.1.0 requires php ^7.1 -> your PHP version (7.0.13) does not satisfy that requirement. - phpunit/phpunit-mock-objects 2.3.8 requires doctrine/instantiator ^1.0.2 -> satisfiable by doctrine/instantiator[1.1.0]. - Installation request for phpunit/phpunit-mock-objects 2.3.8 -> satisfiable by phpunit/phpunit-mock-objects[2.3.8].
Delete the composer.lock file and re-execute composer install, so that the composer.lock file can be regenerated. After the
composer package is automatically loaded, a composer.lock lock file will be generated. Therefore, after pulling other people's code from GitHub, this file needs to be deleted.
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