Installation

Prerequisites

Before installing X2EngineCRM, you should first ascertain whether your hosting environment is properly configured. The following features are required for X2EngineCRM to function properly:

• PHP version 5.3 or later
• PHP's cURL library
• A password-protected MySQL database server connection, and a database on which the user of the connection has all rights (i.e. select, drop, create and update).
• The Apache 2 web server, with mod_rewrite enabled.

Next, ensure that the requirements of Yii Framework, the application building framework on which X2Engine is designed, are met. To do this:

• Download Yii Framework and upload the "requirements" folder to your web server.
• Navigate to the requirements folder on your server using a web browser. You should see a page that looks similar to this:

Note that the following requirements are not necessary:

• The SQLite and PostgreSQL extensions; X2Engine depends on MySQL, so these other extensions will not be used.
• The DOM extension; it is not required.
• The caching extensions (Memcache, APC cache); caching is not currently required, although APC can increase performance
• The SOAP extension; the classes that depend on it are not used

Enabling PHP extensions

If your server does not meet the minimum system requirements for running X2Engine, and you are a system administrator of your server, you will be able to install the necessary modules. Note, however, that as of the most recent version, the MySQL PDO extension is the only extension used by X2Engine that isn't included by default and always enabled in PHP 5.3; the reflection class and extensions SPL, PCRE and Ctype should all be available if PHP is at version 5.3 or later.

In most distributions of Linux, PHP extensions can be easily installed by the distribution's default Package management system. That is the recommended method of installing them; typically, the package manager will automatically configure and reload the HTTP server to enable them.

Ubuntu & Debian

sudo apt-get install php5-mysql

The extension mbstring will typically be included in the Apache module package.

CentOS, RHEL & Oracle Linux

sudo yum install php-pdo php-mbstring

Without Requirements: What Won't Work

If your server environment does not meet the minimum system requirements, and it is not possible to add PHP extensions, you can still install X2Engine, though it is not recommended. Note the following issues that can occur:

Minor Issues

• cURL extension missing:
  • Cannot use any local scripts that make API calls

Major Issues

• PHP version earlier than 5.3 (not recommended; has not been tested on versions earlier than 5.3)
  • Chat does not work
  • Installation form does not fully render (X2EngineCRM versions 1.6.5 - 1.6.6)

Critical Problems

• mbstring
  • Application crashes
• pdo_mysql
  • Application cannot run (required by Yii)
• All other PHP extensions: required by Yii