1,laravel项目执行composer install命令的时候，报错如下：
Some settings on your machine may cause stability issues with Composer. If you encounter issues, try to change the following: The OpenSSL library (0.9.8zf) used by PHP does not support TLSv1.2 or TLSv1.1. If possible you should upgrade OpenSSL to version 1.0.1 or above.
或者
Some settings on your machine make Composer unable to work properly. Make sure that you fix the issues listed below and run this script again: The openssl extension is missing, which means that secure HTTPS transfers are impossible.
If possible you should enable it or recompile php with --with-openssl
2，原因为没有打开OpenSSL扩展，后续打开OpenSSL扩展即可完美避免此错误