How many levels of cyclic arrays can php handle?

Question

is foreach nested inside foreach. I tried the third layer but it didn’t work. It’s so slow. How do the masters handle this situation?

Answer 1

Theoretically unlimited, but most projects will only use three layers

Answer 2

Generally speaking, there are at most three levels of loops. It is not recommended to use more than one. PHP is not good at processing such data. You can change your thinking and use other methods to process it