The name
PHP Hypertext Preprocessor (PHP) was chosen, with Lerdorf??™s approval, to maintain familiarity for
users of PHP/FI.
The core features of PHP are included within the PHP code itself, and additional features are
implemented in the form of extensions. The latest version of PHP is 5, but several implementations
still include the libapache-mod-php4 (PHP 4) package, and PHP 6 is in development. Among the
major changes offered in PHP 5 is enhanced security. This release improved the security features that
have always been in PHP and fixed some possible holes. This made the language even more stable.
Additional information about each release, and what it offers, can be found at www.php.net/.
Setting Up Your LAMP Server
Before proceeding through the examples in this section, be sure that your Linux operating system is
installed and configured. The specific instructions in this section were tested on a Debian GNU/Linux
system. If you try this on a different Linux system, understand that such things as software packaging,
the location of startup scripts and configuration files, and other features may be different.
When you install your Linux system, you typically choose whether to install a set of software packages
that are appropriate for a workstation or a server.
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