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Asked: 2026-05-28T03:45:09+00:00

Basic PHP design questions: I want to define a couple of constants that are

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Basic PHP design questions: I want to define a couple of constants that are accessible to all the files in my website. If I use define() I have to do that for each class which seems silly in that if/when I change that constant for a future release, I’ll have to change it in each file. One option is to put it in a file and then require_once that file in all my source files, but that seems excessive too. Is there a place I can define the constant so that it is global across files?

For example:

define(‘MAX_ELEMENTS’, 5);

At some point in the future, I may change this to 6. I use MAX_ELEMENTS in my business logic everywhere.

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1 Answer

  1. Editorial Team

    It’s very common to have a single, canonical include file used by all (or most) scripts on your website. PHP even has auto_prepend_file to allow for this.

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