PHP ??
PHP (recursive acronym for “PHP: Hypertext Preprocessor” Hypertext Preprocessor) is an interpreted scripting language, with an open source license and partially free (but incompatible with the GPL), originally designed for producing dynamic web pages. It is currently used mainly for developing server side web applications but can also be used to write scripts in command line or standalone applications with graphical user interface.
The configuration file for PHP, called php3.ini in PHP 3, and simply php.ini in later versions, is read at startup of the interpreter of the language and provides the settings of the various forms with which the interpreter was compiled . In the server module version of PHP, this happens only once, at startup the web server. For the CGI and CLI, however, is invoked for each request.
To see all the configuration options you can use the phpinfo ().
In the summer of 2004 PHP5 was realized , a further stage of development. Significant difference to its predecessor, the Zend Engine II, which mainly uses an improved object model, therefore, object-oriented applications running efficiently and allows language constructs such as overcharging. In addition, exceptions, Reflections come, the integration of the SQLite database as well as extensions for XML and DOM manipulation. Many popular blogs (wordpress), content management systems (joomla, drupal, mambo), forums (phpbb, vbulletin, mybb) require PHP in order to run.
BlueHost PHP
Bluehost have the latest php installed and optimized on their servers. You can run php in standard mode or you can run php in fastcgi mode. Fastcgi mode will cause the scripts to run via mad_fcgid instead of mod_suphp. This is configurable via the php.ini. Read more about this at this article: helpdesk.bluehost.com/index.php/kb/article/128 . You can change also the php version in your cpanel under PHP config. Bluehost supports custom PHP.INI to further customize settings if needed.