wget http://pecl.php.net/get/mongo-1.6.10.tgz
tar zvfx mongo-1.6.10.tgz
cd mongo-1.6.10
/usr/local/php-5.5.18/bin/phpize
./configure --enable-mongo=stare --with-php-config=/usr/local/php-5.5.18/bin/php-config
make
make install
cd ..
vim /usr/local/php-5.5.18/etc/php.ini
#-------------------------------------------------
extension=mongo.so
#-------------------------------------------------
/etc/init.d/php-fpm restart