命令行，依次执行： ``` cd /www/server/php/81/src/ext/fileinfo/ /www/server/php/81/bin/phpize ./configure --with-php-config=/www/server/php/81/bin/php-config sed -i "s#CFLAGS = -g -O2#CFLAGS = -std=c99 -g#g" Makefile make && make install echo "extension=/www/server/php/81/lib/php/extensions/no-debug-non-zts-20210902/fileinfo.so" >> /www/server/php/81/etc/php.ini echo "extension=/www/server/php/81/lib/php/extensions/no-debug-non-zts-20210902/fileinfo.so" >> /www/server/php/81/etc/php-cli.ini /etc/init.d/php-fpm-81 restart ``` 即可解决。