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@omerida@phpc.social@syntaxseed @davidbisset I'm guessing assigning to null still keeps the reference count for the array item > 0, so it won't get cleared by garbage collection. And, as you found, explicitly unsetting it does. Tideways has an explanation for memory + variables: https://tideways.com/profiler/blog/what-is-garbage-collection-in-php-and-how-do-you-make-the-most-of-it
Tideways · What Is Garbage Collection in PHP And How Do You Make The Most Of It?Thanks to PHP being an interpreted language and it that it has a garbage collector, PHP developers don't often have to think about memory management. Unlike developers in compiled languages, such as C/C++, we don't have to give that much thought to memory allocation and deallocation.