composer 重装常见错误

install composer error:

------------------------------------　

The PHP exe file you specified did not run correctly:
D:\phpStudy\php\php-5.6.27-nts\php.exe

The php.ini used by your command-line PHP is: D:\phpStudy\php\php-5.6.27-nts\php.ini

A duplicate setting in your php.ini could be causing the problem.

Program Output:
Warning: Module 'fileinfo' already loaded in Unknown on line 0

解决：

检查：php.ini;    

extension=php_fileinfo.dll 加载两次；