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,...
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.
This program will automatically install PHP on your Windows machine running IIS/PWS. It can also install the GD, Sybase, Oracle and Informix extensions.
Articles, tutorials and code, with emphasis placed on MS Windows, ISAPI, COM, ODBC, ActiveX on Linux, databases, installation procedures, GD and cross platform issues.
A compilation of all available PHP debuggers and caches, with benchmarks.
A tutorial on using and installing GD (php_gd.dll) for PHP on Microsoft Windows.
Compares Perl and PHP for building Web sites based on ease of learning, code maintenance, speed and maturity.
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.
A set of training notes summarizing the differences between VBScript, JScript and PHP. Also covers ASP objects and their PHP equivalents. Seperated into 3 parts. | 
