1）	composer update的时候报错

You can also run php --ini inside terminal to see which files are used by PH P in CLI mode

3)	这个时候找到安装php目录。
4)	修改php.ini
5)	打开extension=php_fileinfo.dll 就可以了

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You can also run `php --ini` inside terminal to see which files are used by PH P