Using version ^5.0 for vlucas/phpdotenv
./composer.json has been updated
Loading composer repositories with package information
Updating dependencies (including require-dev)
Your requirements could not be resolved to an installable set of packages.
Problem 1
- Installation request for vlucas/phpdotenv ^5.0 -> satisfiable by vlucas/phpdotenv[v5.0.0].
- Conclusion: remove symfony/polyfill-mbstring v1.2.0
- Conclusion: don't install symfony/polyfill-mbstring v1.2.0
- vlucas/phpdotenv v5.0.0 requires symfony/polyfill-mbstring ^1.17 -> satisfiable by symfony/polyfill-mbstring[v1.17.0, v1.17.1].
- Can only install one of: symfony/polyfill-mbstring[v1.17.0, v1.2.0].
- Can only install one of: symfony/polyfill-mbstring[v1.17.1, v1.2.0].
- Installation request for symfony/polyfill-mbstring (locked at v1.2.0) -> satisfiable by symfony/polyfill-mbstring[v1.2.0].
Installation failed, reverting ./composer.json to its original content.
https://blog.csdn.net/joeson7456/article/details/77827773/