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Editorial Team
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Asked: 2026-05-22T18:25:12+00:00

Like date_add there are many functions date_diff , date_format etc having a corresponding alias

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Like date_add there are many functions date_diff, date_format etc having a corresponding alias in DateTime class.

Do you know if internally DateTime::add calls date_add or vice versa?

And just to make sure: is DateTime class compiled internally in PHP, isn’t’ it? I mean when I call DateTime class, am I calling code that does not need to be parsed 1st by PHP like one of my .php file?!

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1 Answer

  1. Editorial Team

    The DateTime extension is written in C. Consequences are:

    • It’s loaded before execution of any PHP script. So answer is no, it doesn’t need to be parsed by the engine.
    • C obviously doesn’t support objects. Classes are usually mocked upon structs and functions. So DateTime::add translates to date_add with according reference to the “object”.
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