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Learning PHP
I am trying to learn php/mysql and have completed a couple of courses so far on udemy. Still a lot to learn, but my goal is to code my own cms system that I could use on a network of high traffic sites. But while working through online course some questions don't seem to be answered or discussed much yet.
1. How to make script secure? A lot of courses so far are fairly brief on this, are there any good sources for information or books to study?
2. Caching? What caching should I be learning about to help run high traffic sites. I have experience with sites running memcache/smarty template cache.
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