Install Phalcon 3.1 on RedHat/Centos

Prerequisites

Make sure you have the correct compilation software

sudo yum install php-devel php-mysql gcc libtool pcre-devel

Compile

git clone --depth=1 git://github.com/phalcon/cphalcon.git
cd cphalcon/build
sudo ./install

Enable extension

echo "extension=phalcon.so" > /etc/php.d/20-phalcon.ini

Check version

echo Phalcon\Version::get();