Actually, these tips for PHP coding cannnot guarantee improving efficiency in every project. For different apps,some of these tips may be very useful.For exampl

Actually, these tips for PHP coding cannnot guarantee improving efficiency in every project. For different apps,some of these tips may be very useful.For example, I was involved in one of the H.264 decoder development, some of the tiny operations would be run thousands times when decoding a video clip, even a small optimization improved the peformance largely.