A question from Yahoo! Answers:
Latest version of lamp (linux ,apache,my sql,php )?
LAMP is not a single product and thus has no versioning system.
Linux is also not a single product; there are many different distributions (Red Hat, Mandrake, Gentoo, Slackware, and many more), each with its own versioning system.
Apache has two latest versions at any given time, a 2.* version and a 1.3.* version. When the Apache Foundation released version 2.0, it was expected to quickly supplant version 1.3. It didn’t happen; version 2.0 had issues that made the Unix community question its value in a production environment. So the Apache Foundation still maintains both version trees; as of today, the latest versions are 2.2.3 and 1.3.37.
The latest stable version of MySQL is 5.0; 5.1, if I remember correctly, has not yet been officially released.
PHP has lived through a collision somewhat similar to Apache’s; PHP 5 has an updated object model, which means that object-oriented code written for PHP 5 may not work with PHP 4. As a result, both PHP 5 and PHP 4 are still actively developed; the latest versions are PHP 5.1.6 and PHP 4.4.4, respectively.