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My current workflow I include function and class files as and when I need to. However, this can get quite messy with you have quite a lot of them in which some depend on others.
So I’m considering using a head file which includes on the files in the includes directory. But my question is, are there any PHP performance issues for doing this over including as an when i need. Often times I have to use include_once, so doing 1 big include would get rid of the need for this.
The best approach would probably be autoloading. You do not need to (manually) include any class at all, then. Take a look at this. I recommend using the
spl_autoload_register()-function. That would resolve dependencies on the fly. The performance of includes is really irrelevant in most cases. The slow things usually happen in other places. Using autoloading has the added benefit of lazy loading. You do not load source files that are not in use. This might even speed up your application.