1. 安装pecl

wget http://pear.php.net/go-pear.phar
php go-pear.phar

设置$prefix = /www/server/php/74 即当前php安装目录

2. 安装mongodb扩展

pecl install mongodb

3. 配置php.ini

extension = mongodb.so

4. 重启一下php-fpm

service php-fpm restart