Brian Moon has posted a few tricks he's figured out in relation to generating dynamic PHP code (a questionable method for some) you can use elsewhere in your application.
Something that is great about PHP is that you can write code that generates more PHP code to be used later. Now, I am not saying this a best practice. I am sure it violates some rule in some book somewhere. But, sometimes you need to be a rule breaker.
He gives the example of pushing the contents of an array out to a cache file (since the settings rarely change) and then just include the ".php" file when they're needed. The PHP in the file is interpreted and, with the help of an autoloader, all of the values inside will be made available to the rest of the script. Comments on the post mention alternatives to his method like memcache, using var_export and the possibility of using JSON to store the information instead.