You are running Composer with SSL/TLS protection disabled.

php  运行compose  老是出现：You are running Composer with SSL/TLS protection disabled.

解决办法：

　　执行：composer config -g -- disable-tls false

参考地址：https://blog.csdn.net/xcxizz/article/details/52461633

 升级composer

cmd: composer -v  查看当前composer 版本

执行：

　　　　$ composer selfupdate
　　　　Updating to version 1.7.0 (stable channel).
　　　　Downloading: 100%
　　　　Use composer self-update --rollback to return to version 1.2.1