## install
yum install zeromq-devel
## install zmq.so
cd ~
git clone git://github.com/mkoppanen/php-zmq.git
cd php-zmq
phpize && ./configure
make && make install
## add extension to php
cd ~/php-zmq
mv modules/zmq.so /usr/lib64/php/modules
vim /etc/php.d/20-zmq.ini (extension=zmq.so)
## restart apache
## make sure to update your zeromq config port public 9505 & local 50001 for xibo to work.
We are maintaining one such package for Debian/Ubuntu at https://github.com/ajiwo/xmrd but can be used for CentOS/others as well with some modifications as per native OS commands.