Here is a compilation of tips on how to optimize Apache on Unix for PHP and CGI programs. The tips can also be applied to Perl and Python.
PHP4's session variables are stored in files, however, for true scalability, it is better to store this data in a database using a database wrapper library like ADODB. ADODB supports Oracle, MySQL, PostgreSQL, Interbase, MSSQL, VFP, Access, ODBC, ADO
This short comparison by John Lim explains what he likes about PHP vs ASP and why his company is considering switching their language of choice.
Articles, tutorials and code, with emphasis placed on MS Windows, ISAPI, COM, ODBC, ActiveX on Linux, databases, installation procedures, GD and cross platform issues.
This program will automatically install PHP on your Windows machine running IIS/PWS. It can also install the GD, Sybase, Oracle and Informix extensions.
A compilation of all available PHP debuggers and caches, with benchmarks.
This article describes how you can use PHP's ODBC extension to interface with this database system.
A tutorial on using and installing GD (php_gd.dll) for PHP on Microsoft Windows.
Several newsgroup postings that outline the pros and cons of Cold Fusion and PHP and compare them on Platform, Language, Database, File-System Support and more.
Compares Perl and PHP for building Web sites based on ease of learning, code maintenance, speed and maturity. | 
