how to degrade version of Phalcon 3.2.2 to version 2 - php

From this documentation i have installed the phalcon https://phalconphp.com/en/download/linux
i can that it is successfully installed, but the version is 3.2.2, but i have already inbuilt application which works with version 2..
so i want to degrade the version 3.2.2 to 2 how can i do that.?
this is how i installed:
curl -s "https://packagecloud.io/install/repositories/phalcon/stable/script.deb.sh" | sudo bash
sudo apt-get install php5-phalcon
# Ubuntu
sudo apt-get install php5-dev php5-mysql gcc libpcre3-dev
Do i need to remove the version 3.2.2.?
then install v 2 please tell uninstalling and installing version 2.?
help is appriciated.

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Original answer
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I'm trying to install the php_http PHP extension on my CentOS server.
I have done:
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Install PHP Pear if not installed yet:
# yum install php-pear
Install GCC if not installed yet:
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Install cURL if not installed yet:
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Install following libraries if not installed yet:
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# yum install zlib-devel
# yum install pcre-devel
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Add the following line to /etc/php.ini file
extension=raphf.so
extension=propro.so
extension=http.so
Restart apache server so the extension can be loaded
# service httpd restart
You can check if it installed successfully or not:
# pecl list
Step 1) import the REMI repo
CentOS 5
rpm -Uvh http://dl.fedoraproject.org/pub/epel/5/i386/epel-release-5-4.noarch.rpm;
rpm -Uvh http://rpms.famillecollet.com/enterprise/remi-release-5.rpm;
CentOS 6
rpm -Uvh http://download.fedoraproject.org/pub/epel/6/i386/epel-release-6-8.noarch.rpm;
rpm -Uvh http://rpms.famillecollet.com/enterprise/remi-release-6.rpm;
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For other people having this problem. I discovered this question while trying to figure out why I was having the same problem. Turned out the default configuration at my hosting provider was to include php* in the exclude directive for yum. Check /etc/yum.conf and make sure that the package you're trying to install isn't matched by an entry in the exclude directive.
if you are running php 7 you might want to try this
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best of luck
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yum install php70w-pearl php70w-devel
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yum install zlib-devel
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yum install lua-devel lua-static
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So installation should be as simple as
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yum install php-pecl-lua
etc
And, don't forget to read the Wizard instructions
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After watching a lot of threads and installing pear and all the devtool, I finally solved it installing this extension:
yum install php-pecl-mongo
as I seen in - https://madcoda.com/2012/12/install-mongodb-php-driver-in-centos-6-3/

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