查看composer版本时，报错如下
[root@iZm5eajbhqhhehk85j4d95Z ~]# composer --version
PHP Warning: PHP Startup: Unable to load dynamic library 'curl' (tried: /www/server/php/72/lib/php/extensions/no-debug-non-zts-20170718/curl (/www/server/php/72/lib/php/extensions/no-debug-non-zts-20170718/curl: cannot open shared object file: No such file or directory), /www/server/php/72/lib/php/extensions/no-debug-non-zts-20170718/curl.so (/www/server/php/72/lib/php/extensions/no-debug-non-zts-20170718/curl.so: cannot open shared object file: No such file or directory)) in Unknown on line 0
PHP警告：PHP启动：无法加载动态库’curl’
然后，我百度了橙色标记的部分，查出解决方法
这是扩展重复加载，打开php.ini文件，然后将 extension = curl，注释掉，也就是前面加上分号 “;”，之后重启php-fpm即可
转自：https://blog.csdn.net/m0_38026518/article/details/93449282