Here you can find code that I have written during my journeys through the intarwebs. Hopefully, people other than myself will find the code useful.
I am very much an amateur programmer. Please let me know if you improve on the code here in any way. Thanks! 
Conditional GET PHP function
Zenphoto plugin: HTTP Cache Control
Zenphoto plugin: Link Prefetching Hints
Zenphoto plugin: Static Cache Control
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