How to configure your GoDaddy linux hosting plan and .htaccess file to run your *.php pages on PHP 5.2.5.

This is a collection of php code snippets that seem to come in handy rather often. They are assembled here more for my own organization than anything else.
String: trim and convert to lowercase
A very straightforward but useful snippet. A string is first trimmed of any leading or trailing white space, and then converted [...]