cd /home/soft/lnmp1.1-full/php-5.4.31/ext/fileinfo
/usr/local/php/bin/phpize

./configure --with-php-config=/usr/local/php/bin/php-config
make && make install

2.在PHP配置中添加fileinfo插件
用vim编辑php.ini

vim /usr/local/php/etc/php.ini

extension = fileinfo.so