Hi,
I am a small time php programmer. While searching for answers related to some of my queries, I found this link which, I thought will be helpful to my fellow programmers in this family.
This web page has cheat sheets for:
Actionscript,
Ajax,
Apache,
ASCII Character Codes,
CSS,
Django,
Firefox,
Google,
HTML/XHTML,
JavaScript,
MySQL,
Perl,
Photoshop/Gimp,
PHP,
Regular Expressions,
Unix/Linux,
Weblog,
Windows,
XML and more...
The Cheat Sheet Round-Up:
http://www.smashingmagazine.com/2006/10/30/cheat-sheet-round-up-ajax-css-latex-ruby/