Gregory Beaver wrote:
This is a good example of how the flexibility of PHP can bite you, but is also a good example of how bad coding adds both complexity and inefficiency to the resulting software. If f() is called often, there might be a noticeable speedup if it were replaced. I once had a complex database ORM-HTML mapping app that was about 10% faster when I replaced all the "" strings with '' strings. This was on a slow machine with an early PHP, but little things like this can be very important.
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