PHP4
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PHP4 is a popular, freely available web applications development tool. PHP4 includes an HTML-embedded scripting language and a server-side preprocessor that interprets the HTML-embedded code in order to create dynamically generated web pages. PHP4 also supports several databases, including mSQL, MySQL, and PostgreSQL, and is commonly used for the development of database enabled web sites.

PHP4 is the newest version of PHP. It became available on May 22, 2000 and offers improved performance, scalability, features, and extensibility over previous versions.

Installation

NOTE: Most PHP3 scripts should work properly with PHP4. If you have PHP3 scripts that don't work in PHP4, however, a few PHP3 Apache modules are available on FreeBSD Virtual Private Servers.

Do the following, depending on your Virtual Private Server O/S.

NOTE: With the release of PHP 4.2.0, one of the default settings has been changed. This has been found to affect several commonly used scripts, including TWIG. If you are using TWIG or are having trouble with scripts that worked without problems prior to upgrading to version 4.2.0, create a file named php.ini in the ~/usr/local/lib/ directory of your Virtual Private Server. The php.ini file needs to contain at least this line: register_globals = On Preferably, you should alter your code instead of enabling this directive. See the PHP Manual for details.

The best way to install PHP4 is to install the mod_php4 Apache Module. PHP4 can also be installed as a CGI to which PHP4 files are redirected by your web server. Choose one of these:

• Install The mod_php4 Apache Module
• Install The PHP4 CGI

NOTE: Any version of PHP prior to 4.2.2 has a known security vulnerability which can compromise your Virtual Private Server. If you are using PHP 4.1.2 or earlier, we strongly encourage you to upgrade to the latest version.

TWIG - Web-Based E-Mail and More

TWIG (The Web Information Gateway) is a powerful web-based intranet/groupware tool and application framework. It is implemented using PHP, an HTML-embedded scripting language, and the MySQL database application.

More Information

For additional information about PHP4, including documentation, see:

• PHP Manual
• PHPBuilder.com - The Resource for PHP Developers
• CNET Builder.com - Web Programming - Introduction to PHP
• Webmonkey: databases: PHP/MySQL Tutorial
• FAQTS - PHP Knowledge Base
• ASP2PHP - ASP to PHP Conversion Tool

Please note: the information on this page applies to ITS web hosting plans. It may or may not apply to other environments. If you are looking for a feature described here, or better support from your hosting provider, please consider hosting your site with ITS!

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